232%20Chap%204%20outline

232%20Chap%204%20outline - Chapter 4 Tissue: The Living...

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Tissue: The Living Fabric Epithelial Tissue Epithelia cover body surfaces and line body cavities Two forms in the body: Covering and lining epithelium Glandular epithelia Functions include: Protection, absorption, secretion, excretion, filtration, and sensory reception Cellularity – composed almost entirely of cells Special contacts – held together by tight junctions and desmosomes Polarity – apical and basal surfaces Supported by connective tissue – connective tissues form a basement membrane Vascularity - avascular but innervated Regeneration – rapidly replaces lost cells by cell division Glandular Epithelia: Endocrine Glands ductless glands that produce hormones Secretions enter the extracellular space then the blood to affect other organs Exocrine Glands secrete their products onto body surfaces (skin) or into body cavities Examples: mucous, sweat, oil, and salivary glands Exocrine Glands: Modes of Secretion Merocrine glands – products are secreted by exocytosis
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This note was uploaded on 04/07/2008 for the course BIO 232 taught by Professor Turner during the Spring '08 term at Coastal Carolina University.

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232%20Chap%204%20outline - Chapter 4 Tissue: The Living...

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