Loose connective tissue proper includes adipose tissue, areolar tissue, and reticular tissue. This tissue is no longer present after birth, leaving only scattered mesenchymal cells throughout the body. White adipose tissue is most abundant. epithelia are supplied by nerve fibers. The roots ped and pod mean "foot." The root phob means "fear." The root port means "to carry" or "bring." Learn more about how Pressbooks supports open publishing practices. The mesenchymal cell is a multipotent adult stem cell. tissues (part 1) Flashcards | Quizlet Jan 27, 2022 OpenStax. The Benefits of Hair Tissue Mineral Analysis For Athletic - LinkedIn As you might expect, a fibrocyte, a less active form of fibroblast, is the second most common cell type in connective tissue proper. Blood is a fluid connective tissue, a variety of specialized cells that circulate in a watery fluid containing salts, nutrients, and dissolved proteins in a liquid extracellular matrix. Lab 2 Connective Tissue Flashcards | Quizlet connective tissue proper loose connective tissue, adipose. Want to cite, share, or modify this book? Nonetheless, connective tissues have a common structural plan, and we use areolar connective tissue (ah-re 9 o-lar) as our prototype, or model (Figure 4 and Figure 4 . The many mitochondria in the cytoplasm of brown adipose tissue help explain its efficiency at metabolizing stored fat. In adults, new connective tissue cells originate from the ________. The dermis of the skin is an example of dense irregular connective tissue rich in collagen fibers. Roaming, or free, macrophages move rapidly by amoeboid movement, engulfing infectious agents and cellular debris. What attribute of collagen is the source of its great tensile strength? Function: Wraps and cushions organs, macrophages phagocytize bacteria, holds and conveys tissue fluid. Reticular tissue is a mesh-like, supportive framework for soft organs such as lymphatic tissue, the spleen, and the liver ([link]). Chemical reactions (metabolism) are essential for cells to function and, thus, for the body as a whole to maintain boundaries, move, respond, digest, excrete, grow, and reproduce--all necessary life functions. Access for free athttps://openstax.org/books/anatomy-and-physiology. Q. In some tissues, fibers crisscross and form a mesh. electrons pass through any cross section across the wire's width at a steady rate. Other cells move in and out of the connective tissue in response to chemical signals. Can you name the 10 tissue types shown in the histology slides? Brown adipose tissue is more common in infants, hence the term baby fat. In adults, there is a reduced amount of brown fat and it is found mainly in the neck and clavicular regions of the body. . 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. Chemistry: Liquids Flashcards | Quizlet Dense Connective Tissue. Wraps and cushions organs, holds and conveys tissue fluid during inflammation (packages organs, surrounds capillaries) loose adipose connective tissue. These combine to form a proteoglycan with a protein core and polysaccharide branches. In loose connective tissue, the fibers are loosely organized, leaving large spaces in between. Brown adipose tissue is more common in infants, hence the term baby fat. In adults, there is a reduced amount of brown fat and it is found mainly in the neck and clavicular regions of the body. (Micrographs provided by the Regents of University of Michigan Medical School 2012), Cartilage is a connective tissue consisting of collagenous fibers embedded in a firm matrix of chondroitin sulfates. The chemical nature and physical layout of the extracellular matrix and proteins vary enormously among tissues, reflecting the variety of functions that connective tissue fulfills in the body. What type of connective tissue should you expect ligaments to contain? Chapter 4 Tissues Key Concepts Flashcards | Quizlet Macrophages, mast cells, lymphocytes, plasma cells, and phagocytic cells are found in connective tissue proper but are actually part of the immune system protecting the body. Visit this interactive microscope slide link to test your connective tissue knowledge with this 10-question quiz. Unlike epithelial tissue, which is composed of cells closely packed with little or no extracellular space in between, connective tissue cells are dispersed in a matrix. Their effectiveness at storing large amounts of fat is witnessed in obese individuals. Dense regular elastic tissue contains elastin fibers in addition to collagen fibers, which allows the ligament to return to its original length after stretching. Start studying BIOLOGY CH2: TISSUE & ORGAN SYSTEM. These layers are organized into the superficial fascia, deep fascia, and subserous fascia (Figure \(\PageIndex{9}\)). Hyaline cartilage, the most common type of cartilage in the body, consists of short and dispersed collagen fibers and contains large amounts of proteoglycans. Fibroblasts are present in all connective tissue proper (Figure \(\PageIndex{1}\)). It is lighter than compact bone and found in the interior of some bones and at the end of long bones. The matrix contains very few blood vessels. As we explained in Chapter 1, tissues are organized into organs such as the kidneys and heart. Bones rigid extracellular matrix contains mostly collagen fibers embedded in a mineralized ground substance containing hydroxyapatite, a form of calcium phosphate. The matrix contains very few blood vessels. 3.4: Connective Tissue - Medicine LibreTexts Nutrients, salts, and wastes are dissolved in the liquid matrix and transported through the body. Blood contains formed elements derived from bone marrow. Collagen fibers, while flexible, have great tensile strength, resist stretching, and give ligaments and tendons their characteristic resilience and strength. connective tissue that conveys tissue fluids and strengthens organs is_____ areolar. Reticular tissue is a mesh-like, supportive framework for soft organs such as lymphatic tissue, the spleen, and the liver (Figure \(\PageIndex{4}\)). It fills the spaces between muscle fibers, surrounds blood and lymph vessels, and supports organs in the abdominal cavity. Leukocytes, or white blood cells, are responsible for the defense of the organism against potentially harmful microorganisms or molecules. The histology of transverse tissue from long bone (Figure \(\PageIndex{7}\)) shows a typical arrangement of osteocytes in concentric circles around a central canal. Dense regular elastic tissue contains elastic fibers in addition to collagen fibers. Young athletes, dancers, and computer operators; anyone who performs the same movements constantly is at risk for tendinitis. These fibers hold connective tissues together, even during the movement of the body. Ch. 4 Key Terms - Anatomy and Physiology | OpenStax Without collagen, bones would be brittle and shatter easily. Connective tissue proper includes loose connective tissue and dense connective tissue. Anatomy & Physiology Ch 4 Tissues and Functions - Quizlet The matrix is the most abundant feature for loose tissue although adipose tissue does not have much extracellular matrix. The many mitochondria in the cytoplasm of brown adipose tissue help explain its efficiency at metabolizing stored fat. interstitial fluid, proteoglycans, and cell adhesion proteins, ________ is not striated and is under involuntary control, ________ is striated and is under involuntary control, ductless glands that secrete hormones are called ________, examples of _________ include: tubular glands, simple glands, and glands that secrete sweat, _________ is a richly vascularized connective tissue and consists of more cells than extracellular matrix. White adipose tissue can be found protecting the kidneys and cushioning the back of the eye. As you have seen from the tissue types discussed above, the main role of connective tissues is to form the structural framework of the body. In other tissues, stretching in several directions is achieved by alternating layers where fibers run in the same orientation in each layer, and it is the layers themselves that are stacked at an angle. By the end of this section, you will be able to: As may be obvious from its name, one of the major functions of connective tissue is to connect tissues and organs. This is not where connective tissue roles end. (Micrograph provided by the Regents of University of Michigan Medical School 2012), Creative Commons Attribution 4.0 International License, Identify and distinguish between the types of connective tissue: proper, supportive, and fluid, Explain the functions of connective tissues, cells, ground substance, and carbohydrate fibers, cells, ground substance, and protein fibers, collagen, ground substance, and protein fibers. - Location(s): widely distributed under epithelia of body; forms lamina propria of mucous membranes; packages organs; surrounds capillaries Dense irregular elastic tissues give arterial walls the strength and the ability to regain original shape after stretching ([link]). Organ capsules (collagenous type) and walls of arteries (elastic type) contain dense irregular connective tissue. citation tool such as, Authors: J. Gordon Betts, Kelly A. These granules contain the chemical signals histamine and heparin. (Micrograph provided by the Regents of University of Michigan Medical School 2012), This is a loose connective tissue made up of a network of reticular fibers that provides a supportive framework for soft organs. 1. the energy required to increase the surface area of a liquid (surfactant) 2. a measure of the inward pull by interior particles. reticular. Blood is considered a specialized form of connective tissue. In contrast, fixed macrophages are permanent residents of their tissues. In adults, new connective tissue cells originate from the ________. As a consequence, it displays greater resistance to stretching. For active individuals, stretches before exercising and cross training or changing exercises are recommended. The condition causes pain and tenderness in the area around a joint. Dense connective tissue contains more collagen fibers than does loose connective tissue. Study the entries and answer the questions that follow. Connective tissues come in a vast variety of forms, yet they typically have in common three characteristic components: cells, large amounts of amorphous ground substance, and protein fibers. Organ capsules (collagenous type) and walls of arteries (elastic type) contain dense irregular connective tissue. Cells circulate in a liquid extracellular matrix. When stimulated, macrophages release cytokines, small proteins that act as chemical messengers. Between 4-16% of adults in the United States have experienced difficulty swallowing at some point during their lives. This tissue gives rigid support as well as elasticity. White fat contributes mostly to lipid storage and can serve as insulation from cold temperatures and mechanical injuries. areolar. You hear of tennis and golfers elbow, jumpers knee, and swimmers shoulder. Types of Tissues Flashcards | Quizlet Leukocytes, or white blood cells, are responsible for the defense of the organism against potentially harmful microorganisms or molecules. OpenStax Anatomy & Physiology (CC BY 4.0). Cells circulate in a liquid extracellular matrix. It provides protection to internal organs and supports the body. Provides reserve fuel, insulates against heat loss, supports and protects organ Under skin, around kidneys and eyeballs, within abdomen, and in breasts areolar Wraps and cushions organs, its macrophages phagocytize bacteria, plays an important role in inflammation, and holds and conveys tissue fluid Widely distributed under epithelia, forms . In all cases, overuse of the joint causes a microtrauma that initiates the inflammatory response. It allows water, salts, and various nutrients to diffuse through to adjacent or imbedded cells and tissues. A layer of dense irregular connective tissue covers cartilage. Q. Ligaments connect bones together and withstand a lot of stress. Areolar connective tissue. Both strong and flexible, it is found in the rib cage and nose and covers bones where they meet to form moveable joints. consent of Rice University. Areolar tissue shows little specialization. CH 11: Surface Tension, Viscosity, Capillary Action lab quiz 2 tissues, integumentary system Flashcards | Quizlet They originate in the mesodermal germ layer and differentiate from mesenchyme and hematopoietic tissue in the bone marrow. It stores fat for energy and provides insulation. with stands great tensile strength in one direction ( tendons, ligaments) dense . She recommends icing the tender area, taking non-steroidal anti-inflammatory medication to ease the pain and to reduce swelling, and complete rest for a few weeks. It can appear yellow and owes its color to carotene and related pigments from plant food. The dermis of the skin is an example of dense irregular connective tissue rich in collagen fibers. In this way, specialized lymphatic capillaries transport absorbed fats away from the intestine and deliver these molecules to the blood. The mast cell, found in connective tissue proper, has many cytoplasmic granules. BIOLOGY CH2: TISSUE & ORGAN SYSTEM Flashcards | Quizlet Three main types of fibers are secreted by fibroblasts: collagen fibers, elastic fibers, and reticular fibers. Loose connective tissue proper includes adipose tissue, areolar tissue, and reticular tissue. On rare occasions, a sudden serious injury will cause tendinitis. . The major component of the matrix is a ground substance often crisscrossed by protein fibers. Cells circulate in a liquid extracellular matrix. The matrix is the most abundant feature for loose tissue although adipose tissue does not have much extracellular matrix. anatomy-connective tissue Flashcards | Quizlet Elastic fiber contains the protein elastin along with lesser amounts of other proteins and glycoproteins. A large number of capillaries allow rapid storage and mobilization of lipid molecules. Brown adipose tissue is thermogenic, meaning that as it breaks down fats, it releases metabolic heat, rather than producing adenosine triphosphate (ATP), a key molecule used in metabolism. Tissue functions and locations Flashcards | Quizlet Why does an injury to cartilage, especially hyaline cartilage, heal much more slowly than a bone fracture? Connective tissues come in a vast variety of forms, yet they typically have in common three characteristic components: cells, large amounts of amorphous ground substance, and protein fibers. Connective tissues separate and cushion organs, protecting them from shifting or traumatic injury. Keratin is a protein that helps strengthen the cells against abrasion. One of the main functions of connective tissue is to integrate organs and organ systems in the body. -Located under epithelia and is widely distributed. Young, James A. Textbook content produced by OpenStax is licensed under a Creative Commons Attribution License . This ground substance is usually a fluid, but it can also be mineralized and solid, as in bones. If d1=3i^2j^+4k^\vec{d}_1=3 \hat{\mathrm{i}}-2 \hat{\mathrm{j}}+4 \hat{\mathrm{k}}d1=3i^2j^+4k^ and d2=5i^+2j^k^\vec{d}_2=-5 \hat{\mathrm{i}}+2 \hat{\mathrm{j}}-\hat{\mathrm{k}}d2=5i^+2j^k^, then what is (d1+d2)(d14d2)\left(\vec{d}_1+\vec{d}_2\right) \cdot\left(\vec{d}_1 \times 4 \vec{d}_2\right)(d1+d2)(d14d2) ? Unlike epithelial tissue, which is composed of cells closely packed with little or no extracellular space in between, connective tissue cells are dispersed in a matrix. Adipose tissue consists mostly of fat storage cells, with little extracellular matrix (Figure \(\PageIndex{2}\)). (a) Hyaline cartilage provides support with some flexibility. Osteocytes, bone cells like chondrocytes, are located within lacunae. Both strong and flexible, it is found in the rib cage and nose and covers bones where they meet to form moveable joints. Fibroblasts are the most abundant and secrete many protein fibers, adipocytes specialize in fat storage, hematopoietic cells from the bone marrow give rise to all the blood cells, chondrocytes form cartilage, and osteocytes form bone. Dense regular connective tissue fibers are parallel to each other, enhancing tensile strength and resistance to stretching in the direction of the fiber orientations.
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