c. Reticular fiber Which connective tissue cell type secretes histamine? It has relatively high compressive strength, but poor tensile strength, and very low shear stress strength. Dense connective tissue proper is richer in fibers and may be regular, with fibers oriented in parallel as in ligaments and tendons, or irregular, with fibers … The hard outer layer of bones is composed of compact bone tissue, so-called due to its minimal gaps and spaces. Adipose tissue: Yellow adipose tissue in paraffin section with lipids washed out. It holds organs in place and attaches epithelial tissue to other underlying tissues. b. Connective tissue macrophage Specialized connective tissue includes cartilage, bone, adipose tissue, blood and hemopoietic tissue, and lymphatic tissue. Collagen fibers are the most abundant fiber type in connective tissue. Connective tissue is the most abundant and widely distributed of the primary tissues. Purkinje fibers are specialized muscle fibers. Together the ground substance and fibers make up the extracellular matrix. Plasma cells are derived from B lymphocytes. a. Mucous connective tissue b. e. Mast cell. Connective tissue can be sub-classified into connective tissue proper, specialized connective tissue and embryonic connective tissue. Fats/bones The most abundant fibers of connective tissues are A) Reticular B) Elastic C) Collagen D) Glycoprotein Reticular 12 Which of the following is a loose connective tissue? c. Unilocular adipose tissue Mast cells secrete histamine. Lipids are best displayed with a sudan stain. Collagen fibers are fibrous proteins and are secreted into the extracellular space and they provide high tensile strength to the matrix. Like to the timber framing of a house, the connective tissue provides structure and support throughout the body. Connective tissue (CT) is a one of the four main classes of tissues. Bones Storage – (energy, electrolytes) -- Ex. The also secrete heparin, SRS-A (slow reacting substance of anaphylaxis, ECF-A (eosinophilic chemotactic factor of anaphylaxis. d. Dense irregular connective tissue Movement. Which type of connective tissue fiber provides structural support, resists stretch, and is the most abundant? This histology test bank is also useful for the histology questions on the USMLE (USMLE step 1). Embryonic connective tissue includes mesenchyme and mucous connective tissue. a. Fibroblast The histiocyte is a connective tissue macrophage. The most common cell found within connective tissue is the fibroblast. What is areolar tissue? A: Collagen Fibers are found in most supporting tissues and collagen is the most abundant protein in the body (Wheaters). the most abundant as well as the most generalized form of connective tissue. This tissue gives bones their smooth, white, and solid appearance, and accounts for 80% of the total bone mass of an adult skeleton. This is present during fetal development and then decreases after birth. Tap card to see definition . The primary tissue of bone, osseous tissue, is a relatively hard and lightweight composite material, formed mostly of calcium phosphate in the chemical arrangement termed calcium hydroxylapatite. Anatomy and Physiology of Animals/Body Organisation. White adipose tissue is unilocular adipose tissue. All rights reserved. With the tensile strength of collagen, this tissue forms tendons, aponeurosis and ligaments. It is a major part of the embryonic skeleton, the costal cartilages of the ribs, and the cartilage of the nose, trachea, and larynx. b. b. Mesenchyme It is part of the skin dermis area and in the joint capsules of the limbs. It is an atypical connective tissue since it does not bind, connect, or network with any body cells. They help the connective tissue to stretch and recoil. This type of tissue persists into adulthood. 1. Because it is compressible and resists tension well, fibrocartilage is found where strong support and the ability to withstand heavy pressure are required. Collagen fibers can be differentiated from other fibers by staining with Masson's trichrome stain. d. Multilocular adipose tissue e. Muscle fibers. 2. These are the most abundant protein fiber type, providing varying degrees of strength and rigidity to tissues. Elastic fibers are long, thin fibers that form branching network in the extracellular matrix. e. Mast cell. Mast cells secrete histamine. Connective tissue has three main components: Together the ground substance and fibers make up the extracellular matrix. It is found in the intervertebral discs of the bony vertebrae and knee meniscus. e. Both a and d. Brown adipose tissue is multilocular adipose tissue. a. Collagen fiber This is considered a specialized form of connective tissue. Dense connective tissue is divided into 1) dense regular, 2) dense irregular, 3) elastic. Purkinje fibers are specialized muscle fibers. Describe the diverse types of connective tissue. There are three types of fibers found in connective tissue: collagen fibers, elastic fibers, and reticular fibers. This is similar to hyaline cartilage but is more elastic in nature. These tissues are widely distributed and serve as a universal packing material between other tissues. Cartilage – less hard and more flexible than bone. Connective Tissue Types • Hyaline cartilage • Most common cartilage • Composed of: • Abundant collagen fibers • Rubbery matrix • Entire fetal skeleton is hyaline cartilage Figure 3.19b Connective Tissue Types • Elastic cartilage • Provides elasticity • Example: supports the external ear a. Fibroblast It consist of a loose network of collagen and elastin fibers containing a wide distribution of … 2. Which is the most abundant fiber in connective tissue? Brown adipose tissue Fibers of Connective Tissue. b. Hematoxylin and eosin stain c. Loose irregular connective tissue Wharton's jelly is mucous connective tissue. Mesenchyme is embryonic connective tissue. This tissue resembles areolar connective tissue, but the only fibers in its matrix are the reticular fibers, which form a delicate network. Dense connective tissue – also called dense fibrous tissue 4. Polysaccharides and proteins secreted by fibroblasts combine with extra-cellular fluids to produce a viscous ground substance that, with embedded fibrous proteins and cells, forms the extra-cellular matrix. This consists of closely packed bundles of collagen fibers running in the same direction. During the process of tissue repair, which of the following processes produces scar tissue? e. Dense connective tissue. They are the strongest and provide high tensile strength (that is the ability to resist longitudinal stress), stress test shows that collagen fibers are stronger than steel fibers of the same size. Dense regular connective tissue comprises tendons and ligaments. As the name implies, connective tissue serves a connecting function: It supports and binds other tissues in the body. 5. Its porosity is 5–30%. Fibroblasts produce collagen. Myofibroblasts contain properties of both fibroblasts and smooth muscle cells. They usually stain pink and are the thickest fiber. Tap again to see term . Connective tissue has three main components: cells, fibers, and ground substance. There are three types of fibers found in connective tissue: collagen fibers, elastic fibers, and reticular fibers. B: Fibroblasts are the cells that produce collagen and elastin that form the fibers found in connective tissue. e. Masson's trichrome stain. It is comprised of cells and extracellular matrix, including fibers and ground substance. A peripheral blood smear would be best visualized with Wright's stain. Tendons, ligaments, and the white stringy tissue (fascia) seen in some cuts of meat are composed almost entirely of collagen, as is leather, which consists of the connective tissue layer (dermis) of animal skins. Which is the most abundant fiber in connective tissue? Most widespread is hyaline cartilage. Cartilage is a flexible connective tissue found in many areas in the bodies of humans and other animals, including the joints between bones, the rib cage, the ear, the nose, the elbow, the knee, the ankle, the bronchial tubes, and the intervertebral discs. Collagen fibers are predominantly made of collagen type I. a. Collagen fiber b. Elastic fiber c. Reticular fiber d. Purkinje fiber e. Muscle fibers. The major functions of connective tissue include: Connective tissues encompass a diverse array of tissue types that are involved in binding and supporting body structure and tissues. e. Dense regular connective tissue. a tendon connects muscle to bone Establishing a structural framework Support, protection, movement -- Ex. The most abundant cell in connective tissue proper is the fibroblast. Collagenous connective tissue is divided into two types, based upon the ratio of collagen fibers to ground substance: Loose (areolar connective tissue) is the most abundant form of collagenous connective tissue. It is an undifferentiated tissue found in the embryo. b. Elastic fiber Key Points: Connective tissue is the most abundant and widely distributed of the primary tissues. Connective tissue can be sub-classified into connective tissue proper, specialized connective tissue and embryonic connective tissue. Its main role is to store energy in the form of lipids, although it also cushions and insulates the body. Tendons, … Collagen: Collagen fibers are the strongest and most abundant of all the connective tissue fibers. Connective Tissue Proper (LARDE) (general/basic category of Conn. tissue b/c their matrix is about the same/jello­like) loose connective tissue adipose tissue reticular connective tissue Tells what fibers to look for dense connective tissue Which of the following can be classified as "embryonic connective tissue"? This has the same structural elements as dense regular tissue, but the bundles of collagen fibers are much thicker and arranged irregularly. Most abundant are the fibres composed of the protein collagen. Click again to see term . Cartilage is composed of specialized cells called chondroblasts and, unlike other connective tissues, cartilage does not contain blood vessels. How to solve: Which cell type is most abundant in connective tissue? Ground substance is a clear, colorless, viscous fluid that fills the space between the cells and fibers. c. Histiocyte Dense irregular connective tissue is seen in the dermis. These fibers allow the tissues to recoil after stretching. The two types of adipose tissue are white adipose tissue (WAT) and brown adipose tissue (BAT). Collagen fibers, the most abundant of the connective tissue fibers, are produced by fibroblasts and stain pink with eosin. Top of Page. A) Fibrocartilage B) Areolar C) Spongy bone D) Elastic Connective Areolar 13 The main fibers that form this tissue are elastic in nature. Mast cells also secrete heparin, SRS-A (slow reacting substance of anaphylaxis, ECF-A (eosinophilic chemotactic factor of anaphylaxis. Collagen fibers are the most abundant fiber type in connective tissue. It is technically composed of roughly only 80% fat. b. Mesenchyme Cartilage is classified in three types: 1) elastic cartilage, 2) hyaline cartilage, and 3) fibrocartilage, which differ in the relative amounts of these three main components. (adsbygoogle = window.adsbygoogle || []).push({}); Connective tissue is incredibly diverse and contributes to energy storage, the protection of organs, and the body’s structural integrity. Connective Tissue Found everywhere in the body Includes the most abundant and widely distributed tissues Functions of CT Binds body tissues together (Binding of organs -- Ex. d. Mucous connective tissue Connective tissue is classified into two subtypes: soft and specialized connective tissue. Blood is a bodily fluid in animals that delivers necessary substances, such as nutrients and oxygen, to the cells and transports metabolic waste products away from those same cells. Which of the following would be best suited to visualize reticular fibers? Tap again to see term . The ground substance functions as a molecular sieve for substances to travel between blood capillaries and cells. Blood is considered a specialized form of connective tissue. a. d. Cartilage 3. It is made up of blood cells and is surrounded by a nonliving fluid called plasma. The lymphatic system is a part of the circulatory system, comprising a network of conduits called lymphatic vessels that carry a clear fluid called lymph unidirectionally towards the heart. c. Sudan stain In humans, adipose tissue is located beneath the skin (subcutaneous fat), around internal organs (visceral fat), in bone marrow (yellow bone marrow), and in breast tissue. This tissue is found in areas where tension is exerted from many different directions. Cartilage is avascular, while dense connective tissue is poorly vascularized. Purkinje fibers are seen in the heart. The functions of areolar connective tissue include the support and binding of other tissues. 4. Loose connective tissue is a category of connective tissue which includes areolar tissue, reticular tissue, and adipose tissue.Loose connective tissue is the most common type of connective tissue in vertebrates. From the most rigid to softest, the major connective tissue classes are the following: 1. e. Mesenchyme, 6. The most abundant fiber in connective tissues is a tough protein called collagen. Which connective tissue cell type produces collagen? Which of the following can be classified as "specialized connective tissue"? The fibroblast also produces the ground substance in connective tissue. Although it is the most abundant and widely distributed of the primary tissues, the amount of connective tissue in a particular organ varies. a. Adipose tissue The matrix is the most abundant feature for loose tissue although adipose tissue does not have much extracellular matrix. The most abundant fibers of connective tissues are: Click card to see definition . Connective tissue fibers provide support. The fibroblast also produces the ground substance in connective tissue. This tissue forms the fascia, which is a fibrous membrane that wraps around the muscles, blood vessels, and nerves. Reticular fibers are short, fine collagenous fibers that can branch extensively to form a delicate network. It is found in the external ear (known as an auricle) and in the epiglottis. Structural elements of connective tissue: Connective tissues consist of three parts: cells suspended in a ground substance or matrix; and most have fibers running through it. Polysaccharides and proteins secreted by fibroblasts combine with extra-cellular fluids to produce a viscous ground substance that, with embedded fibrous proteins, forms the extra-cellular matrix. Major functions of connective tissue include: 1) binding and supporting, 2) protecting, 3) insulating, 4) storing reserve fuel, and 5) transporting substances within the body. It occurs in small, elongated bundles separated by regions that contain ground substance. c. Blood This offers great diversity in the types of connective tissue. This is especially seen in the arterial blood vessels and walls of the bronchial tubes. Adipose connective tissues are large fat located underneath the skin. Author: Rachel Baxter BSc, MSc • Reviewer: Uruj Zehra MBBS, MPhil, PhD Last reviewed: October 29, 2020 Reading time: 7 minutes Connective tissue is mainly a supporting tissue that binds and supports organs and the body as a whole. Image Source: austincc.edu. Collagen. Connective tissue has a wide variety of functions that depend on the types of cells and the different classes of fibers involved. Connective tissues can have various levels of vascularity. What layer(s) of the skin are blood vessels found within? d. Silver impregnation False. Simple squamous epithelium tissue is commonly located in high friction areas of the body. Collagen fibers are the most abundant CT fibers. 8. d. Purkinje fiber General Biology/Tissues and Systems/Connective Tissue. Others, such as bone, are richly supplied with blood vessels. There are three types of protein fibers; collagen, elastic and reticular. Purkinje fibers are seen in the heart. This is a flexible connective tissue found in many areas in the bodies of humans and other animals, including the joints between bones, the rib cage, the ear, the nose, the elbow, the knee, the ankle, the bronchial tubes, and the intervertebral discs. Connective tissue has three main components: cells, fibers, and ground substance. Silver impregnation, such as with a reticular stain, can be used to visualize reticular fibers. It is composed of proteoglycans and cell adhesion proteins that allow the connective tissue to act as glue for the cells to attach to the matrix. d. Plasma cell The fibrous components of loose areolar connective tissue, when viewed with the light microscope, appear as colourless strands of varying diameter running in all directions, and, if not under tension, these have a slightly undulant course. Loose connective tissue is divided into 1) areolar, 2) adipose, 3) Dense connective tissue proper is richer in fibers and may be regular, with fibers oriented in parallel as in ligaments and tendons, or irregular, with fibers … Connective tissue proper consists of loose irregular connective tissue and dense connective tissue (regular and irregular). reticular. Dense connective tissue. Filling the interior of the bone is the trabecular bone tissue (an open cell porous network also called cancellous or spongy bone), which is composed of a network of rod and plate-like elements that make the overall organ lighter and allow room for blood vessels and marrow. It is mostly formed of calcium phosphate in the chemical arrangement termed calcium hydroxyapatite, which gives bones their rigidity. d. Plasma cell 7. 2. 3. Bone – also called osseous tissue, is composed of bone cells sitting in cavities called lacunae. What type of adipose tissue tends to decrease as humans age? These fibers are flexible, but do not stretch and, thus, provide great tensile strength to the tissue. Together the ground substance and fibers make up the extracellular matrix. Describe the main characteristics and functions of connective tissue. Instructions: For each histology question, pick the one best answer. Fibroblasts produce collagen. Adipose tissue is found in specific locations, referred to as adipose depots. a. Copyright (c) Histology-World and its licensors. Collagen fibers:They are tough, thick and non-branching fibers. Adipose tissue or body fat is loose connective tissue composed of adipocytes. This is a blend of hyaline cartilage and dense regular connective tissue. Click again to see term . Collagen fibers and reticular fibers both belong to the collagen family, of which there are over 20 different types. The composition of these three elements vary tremendously from one organ to the other. Hematoxylin and eosin stain is the most commonly used tissue stain for routine histological examination. Bone tissue is also called the osseous tissue. Connective tissue is divided into four main categories: Connective tissue proper has two subclasses: loose and dense. It provides strong support while providing pads for shock absorption. 3. Fibroblasts, histiocytes, plasma cells, and mast cells are routinely seen in loose connective tissue. Its function is to maintain the shape of the structure while allowing flexibility. Loose irregular connective tissue is areolar tissue. The most abundant fiber in connective tissues is a tough protein called collagen. a. Fibroblast b. Connective tissue macrophage c. Histiocyte d. Plasma cell e. Mast cell. These collagen fibers are slightly wavy and can stretch a little bit. Which connective tissue cell type produces collagen? The matrix is the most abundant feature for loose tissue although adipose tissue does not have much extracellular matrix. Its matrix appears transparent or glassy when viewed under a microscope. They are small purple cells found inside the connective tissue Anatomy and physiology of animals loose connective tissue. Three types of fibers are found in connective tissue: Collagen: Collagen fibers are the strongest and most abundant of all the connective tissue fibers. This is loose connective tissue composed of adipocytes. It also helps in defending against infection. They have great tensile strength.They are the most abundant type of fibers in the body.T There are many tpes of collagen fibers, them ost common types of collagen fibers are: Type I collagen fibers: Are most abundant are found in: Dermis of skin; Fascia c. Histiocyte Collagen fibers are fibrous proteins and are secreted into the extracellular space and they provide high tensile strength to the matrix. In vertebrates, it is composed of blood cells suspended in a liquid called blood plasma. Connective Tissue Proper . The reticular tissue is limited to certain sites in the body, such as internal frameworks that can support lymph nodes, spleen, and bone marrow. Collagen fiber. CC licensed content, Specific attribution, http://en.wiktionary.org/wiki/extracellular_matrix, http://en.wikipedia.org/wiki/Connective_tissue%23See_also, http://en.wikipedia.org/wiki/Connective_tissue, http://en.wikibooks.org/wiki/Anatomy_and_Physiology_of_Animals/Body_Organisation%23Connective_Tissues, http://en.wiktionary.org/wiki/connective_tissue, http://commons.wikimedia.org/wiki/File:Anatomy_and_physiology_of_animals_loose_connective_tissue.jpg, http://commons.wikimedia.org/wiki/File:Fibers_of_Collagen_Type_I_-_TEM.jpg, http://en.wikipedia.org/wiki/Lymphatic_system, http://en.wikipedia.org/wiki/Adipose_tissue, http://en.wikibooks.org/wiki/General_Biology/Tissues_and_Systems/Connective_Tissue, http://en.wiktionary.org/wiki/adipose_tissue, http://upload.wikimedia.org/wikipedia/commons/2/27/Yellow_adipose_tissue_in_paraffin_section_-_lipids_washed_out.jpg. This is is the most abundant of all cartilage in the body. Loose connective tissue Primary tissue of the dermis Match the following type of connective tissue fiber with its description: Collagen fibers The strongest and most abundant fibers, they allow connective tissues to resist tension. Unlike epithelial tissue, which has cells that are closely packed together, connective tissue typically has cells scattered throughout an extracellular matrix of fibrous proteins and glycoproteins attached to a basement membrane. Collagen fibers are the most abundant fiber type in connective tissue. The osseous tissue is relatively hard and lightweight in nature. Mucous connective tissue is a type of embryonic connective tissue; it is a subset of mesenchyme. c. Adipose tissue Classification of Connective Tissue. When a body region is inflamed, the areolar tissue in the area soaks up the excess fluid as a sponge and the affected area swells and becomes puffy, a condition called edema. b. Myofibroblast Bone a. Wright's stain White adipose tissue
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