BIOLOGY 101 Lecture Notes - Lecture 4: Skeletal Muscle, Hyperthermia, Abdominal Cavity

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Epithelial tissues are named for the shape of the cell and the number of cell layers: key structural characteristics: A free surface that is specialized for protection, secretion, or absorption. A basement membrane that binds the epithelial cells to underlying connective tissue and helps the epithelial tissue resist stretching. Simple squamous: one layer of flattened cells, located in air sacs of lungs, heart, and blood vessel linings, allows exchange of nutrients, gases, and wastes. Stratified squamous: several layers of flattened cells, located on surface of skin, lining of mouth, esophagus, and vagina, provides protection against abrasion, infection, and drying out. Located in ducts of mammary glands, sweat glands, and salivary glands. Rare, located in urethra (tube through which urine leaves the body). Located in linings of kidney tubules and glandes. Located in lining of gut and respiratory track. Glands are epithelial tissue that secretes a product.

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