KIN 2500 Chapter : SI Chapter 4
15 Mar 2019
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A group of cells that usually have a common origin and function together to carry out specific activities: body tissues can be classified into four basic types of tissues according to their structure and function. Describe their functions: epithelial: covering our body surfaces, line hollow organs, body cavities, and ducts; forms glands. Cell junctions: cell junctions are contact points between the plasma membrane of tissue cells. Epithelial tissue: consists of cells arranged in continuous sheets in either single or multiple layers, epithelial tissues have three major functions: This surface may contain microvilli or cilia: the surface that faces the adjacent cells on either side is the lateral. This surface may contain tight junctions, adherens junctions, desmosomes, and/or gap junctions: the surface that is opposite of the apical surface is the basal. This surface is the deepest layer of epithelial cells and adheres to extracellular material such as the basement membrane, a thin extracellular layer.
