KAAP220 Lecture Notes - Lecture 9: Mammary Gland, Salivary Gland, Nephron
23 Oct 2018
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Document Summary
Lines parts of kidney tubules and thyroid gland. Found in ducts of sweat glands and mammary glands. Unusual stratified epithelium that can stretch and recoil without damage. Cells taller and more slender than cuboidal. Elongated nuclei in band close to basement membrane. Absorb substances and protect the body from digestive chemicals. Found where absorption or secretion takes place. Lines stomach, intestine, gallbladder, uterine tubes, kidney ducts. May have microvilli (for absorption) or cilia (for movement) on apical surface. Distance between nuclei varies, giving appearance of layering or being stratified. Lines nasal cavities, trachea, larger airways in lungs, portions of male reproductive tract. Found lining large ducts such as those of salivary glands or pancreas. Collections of epithelial cells that produce secretions. Can be scattered cells or complex organs. Release secretions into ducts onto epithelial surface. Product released from secretory vesicles by exocytosis. Merocrine secretion that mixes with water to form mucus. Cell releases cytoplasm as well as secretory product.
