Examples serous membranes location lines body

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Examples-
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Serous Membranes Location- lines body cavities with no external opening (parietal); covers surfaces of internal organs (visceral) Lining layer of epithelium + underlying layer of connective tissue Function – secrete lubricating fluid to allow internal organs to move easily within body cavities Types Pericardium
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Synovial Membranes Location- lines cavities of freely moveable joints Areolar Connective Tissue Membrane (no epithelium) Function – Secrete fluid to lubricate and nourish cartilage within a joint and sheaths surrounding tendons, and in areas of friction. Example
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Muscle Tissue Functions Movement Maintain Posture Generates Heat Characteristics Contracts or shortens with force Moves entire body and pumps blood Types Skeletal : most attached to skeleton, but some attached to other types of connective tissue. Striated and voluntary. Cardiac : muscle of the heart. Striated and involuntary. Smooth : muscle associated with tubular structures and with the skin. Nonstriated and 4-25
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Skeletal Muscle Tissue Location- usually attached to bones Function- allow movement of body parts, maintain posture, generate body heat. Characteristics Striated (Looks stripy- due to protein fibers within cells) Voluntary Multi-nucleated cells Cells are typically amitotic
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Cardiac Muscle Tissue Location – wall of heart Function- contractions circulate blood Characteristics Striated (stripy looking) Involuntary Branched cells with one or two nuclei Intercalated discs (thickened regions of cell membrane with many cell junctions) Cells are amitotic
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Smooth Muscle Tissue Location- in walls of hollow internal structures Function- regulate diameter of blood vessels; move food along gastrointestinal tract; contraction of urinary bladder Characteristics Not striated Involuntary Tapered cells with single nucleus
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Muscle Tissue Comparisons
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Nervous Tissue Functions Sensory- detect stimuli Integration- process information Motor- stimulate muscle contractions or cause glands to secrete
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Nervous Tissue Two Components Neurons Cells that conduct action potentials ( electrical impulses) All except olfactory neurons are generally amitotic. Neuroglia Support, nourish, protect, repair neurons Are specialized epithelial or connective tissue cells
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