Anatomy and Cell Biology 3309 Lecture Notes - Lecture 1: Respiratory Epithelium, Proteoglycan, Type Iv Collagen

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Organized accumulation of cells and their products that function in a collective manner. 4 basic tissues: epithelial: lines outside of the body and inside of hollow organs/cavities. Tissues that cover all surfaces that are exposed to the external environment (skin, lungs, gut, kidneys etc. : connective: provides structural and functional support for other tissues. Large number of tissues represented: connective tissue proper, blood, bone, cartilage, immune system. Some are filler, protective, and store energy: muscle: contracts to cause movement. 3 types: skeletal (voluntary one shown in the picture), cardiac (heart), smooth (hollow organs: nervous: transmits electrical and chemical signals which control body functions. Location = covers surfaces and lines walls of hollow organs and body cavities. Hypodermis (yellow bit with fat) and dermis sit below the epithelial cells of the skin. If we tear off our skin, fluid loss becomes a concern because the barrier is lost. Functions of epithelial tissue: barrier o.

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