ITEC 1000 Lecture Notes - Lecture 9: Endocrine System, Dermis, Human Musculoskeletal System
15 Oct 2016
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Document Summary
The cells of a tissue can function in a coordinated manner when the plasma membranes of adjoining cells interact. Three common types of junctions link epithelial cells: tight, gap and adhesion junctions. Loose fibrous connective tissue supports epithelium and also many internal organs. Tendons and ligaments are made up of dense fibrous connective tissue, which contains many collagen fibers that are packed together. Loose and dense fibrous connective tissues have cells called fibroblasts. In adipose tissue, the fibroblasts enlarge and store fat. Reticular connective tissue forms the supporting meshwork of lymphoid tissue. Cartilage is a specialized form of dense fibrous connective tissue, which most commonly forms the smooth surfaces that allow bones to slide against each other in joints. There are three types of cartilage, distinguished by the type of fiber in the matrix: hyaline, elastic, and fibrocartilage. Compact bone makes up the shaft of a long bone, while the ends of a long bone contain spongy bone.
