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Related Flashcards
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Cards In This Set
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Tissue?
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Collections of specialized cells and cell products that perform a limited number of functions.
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Histology
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The study of tissue
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Epithelial Tissue
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Covers exposed surfaces, lines internal passageways and chambers and forms glands.
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Connective Tissue
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*fills internal spaces*provides structural support for other tissue, *transports material within the body,* and stores energy
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Muscle Tissue
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*specialized for contraction *includes the skeletal muscle of the body *muscles of the heart*muscular wall of hollow organs
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Neural Tissue
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Carries info from one part of the body to another in the form of electrical impulses
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What is Epithelium?
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Layers pf cells that cover internal or external surfaces
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Whats are glands?
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Structures that produce fluid secretions either attached to or derived from epithelia
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Cellularity
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Epithelia are composed almost entirely of cells bound closely together by cell junctions.
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Polarity
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Differences in structure and functions on exposed vs attached surfaces
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Attachment
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The base of an epithelium is bound to a thin basement membrane(basal lamina)
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Avascularity
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Epithelia that are without vessels. They must obtain nutrients by diffusion or absorption across the exposed or attached epithelial surface
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Regeneration
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Epithelia cells that are damaged or lost at the exposed surface are continuously replaced through stem cell division to the epithelium
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Provides Physical Protection
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Epithelia protects exposed and internal surfaces from abrasions, dehydration, and destruction by chemical or biological agents
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Control Permeability
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Any substance that enters or leaves the body must cross an epithelium
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