Connective tissue proper includes loose connective tissue and dense connective tissue. Dense regular elastic tissue contains elastic fibers in addition to collagen fibers. The fibres are mostly of two types : (a) White collagen fibres. Can you name the 10 tissue types shown in the histology slides? Surgical repair of a tendon is painful. Persons whose jobs and hobbies involve performing the same movements over and over again are often at the greatest risk of tendinitis. Under the microscope, tissue samples appear clear. The main property of elastin is that after being stretched or compressed, it will return to its original shape. The major component of the matrix is a ground substance often crisscrossed by protein fibers. Collections of tissues joined in units to serve a common function compose organs. The brown adipocytes store lipids as many droplets, and have high metabolic activity. Occurrence. Called osteoblasts, embedded in a firm, calcified matrix. 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. Besides, they are the wide-spaced cell in the small cavities … Some cells have the ability to cross the endothelial layer that lines vessels and enter adjacent tissues. This layer of areolar connective tissue serves as an anchor for the serous membranes to surrounding superficial structures. The second category includes those where the connective tissue is the target of antibodies directed against it. Classification of Connective Tissues. Specialised Connective Tissue. Adipocytes are cells that store lipids as droplets that fill most of the cytoplasm. 2. A. 1. Q. Ligaments connect bones together and withstand a lot of stress. White adipose tissue can be found protecting the kidneys and cushioning the back of the eye. The lacunae are also traversed by nerves and blood vessels. Dense connective tissue is reinforced by bundles of fibers that provide tensile strength, elasticity, and protection. Heparin, also released as part of the inflammatory response, acts as an anticoagulant that prevents the formation of blood clots. Areolar tissue shows little specialization. Type # 1. Lymph transports the nutrients (oxygen, glucose) that may have filtered out of the blood capillaries back into the heart to be recirculated in the body. 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. A. cells, ground substance, and carbohydrate fibers, B. cells, ground substance, and protein fibers, C. collagen, ground substance, and protein fibers. Growth of cartilage occurs continuously due to multiplication of chondrocytes by mitosis, deposition of matrix within existing cartilage and from activity of the deeper cells of the perichondrium. Discuss how blood fulfills this role. Definition. 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. The histology of transverse tissue from long bone (Figure \(\PageIndex{7}\)) shows a typical arrangement of osteocytes in concentric circles around a central canal. 2. The following points highlight the three main types of connective tissues. Bone tissue is highly vascularized. This […] Cartilage is soft, elastic The condition causes pain and tenderness in the area around a joint. Bone is a highly vascularized tissue. [ "article:topic", "adipose tissue", "matrix", "adipocytes", "collagen fiber", "areolar tissue", "connective tissue proper", "dense connective tissue", "chondrocytes", "elastic cartilage", "elastic fiber", "fibroblast", "fibrocyte", "fibrocartilage", "fluid connective tissue", "ground substance", "hyaline cartilage", "loose connective tissue", "lacunae", "mesenchymal cell", "mucous connective tissue", "mesenchyme", "reticular fiber", "parenchyma", "reticular tissue", "supportive connective tissue", "authorname:openstax", "license:ccby", "showtoc:no", "source[1]-med-594", "source[2]-med-594", "program:oeri" ], Connective Tissue Fibers and Ground Substance, http://virtualslides.med.umich.edu/Histology/, http://www2.yvcc.edu/histologyzoomer...issueQuiz.html, https://openstax.org/books/anatomy-and-physiology, Identify and distinguish between the types of connective tissue: proper, supportive, and fluid, Explain the functions of connective tissues. The cells present in the tendons are elongated fibroblasts which lie in almost continuous rows here and there. The connective tissues include several types of fibrous tissue that vary only in their density and cellularity, as well as the more specialized and recognizable variants— bone, ligaments, tendons, cartilage, and adipose (fat) tissue. The following paragraphs will describe the general connective tissue, because the description of the other types of connective tissue is out of the purpose of this text. A. lacuna). They are  made up of a protein called collage, which on boiling with water changes to gelatin, and (b) yellow elastic fibres. Out of the body Imagine constructing a house using typical building components,,. And bone, and fluid tissue, for example blood and lymph vessels, and.! Become chondrocytes when get surrounded within special fluid-filled chambers, called lacunae ( spaces ) which are described further a! 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