lecture_7_neuro

lecture_7_neuro - Muscle Tissue Types Skeletal Cardiac...

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Unformatted text preview: Muscle Tissue Types Skeletal Cardiac Smooth Last lecture-muscle Skeletal Muscle-muscle fibers (cells)-long cells (35 cm) -multinucleate-in cross section-polygonal-may appear speckled-in bundles (fascicles)-peripheral nucleus-in longitudinal section-long -striated-peripheral nuclei-unbranched Muscle Tissue-types-skeletal Cardiac Muscle-striated muscle-branched fibers-1-2 nuclei/cell (square/central)-intercalated disks-highly vascularized Muscle Tissue-types-cardiac muscle Smooth muscle-appears smooth-very few blood vessels-central elongate nucleus-concentric layers-can be very thick Muscle Tissue-types-smooth muscle Muscle Tissue-types-comparison feature skeletal cardiac smooth sarcomeres yes yes no nuclei Many peripheral 1-2 square central Elongate central T-tubules small large none junctions none Intercalated discs Gap junctions regeneration Yes Satellite cells none Yes mitosis features Long cells polygonal peripheral nuclei Short branched Square central nuclei Intercalated discs Short fusiform Central nuclei No striations Muscle Types Comparison Muscle Tissue-types-specialized Specialized muscle cells-myoepithelial cells-expel contents of glands-pericytes-smooth muscle in blood vessels-myofibroblast-contractile fibroblast-found in scars Muscle Tissue-clinical Muscle Diseases Myasthenia Gravis (autoimmune ACHr) Muscular dystrophy (cell surface, cytoplasm, connective tissue, nuclear, myofibril) QuickTime and a TIFF (Uncompressed) decompressor are needed to see this picture....
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lecture_7_neuro - Muscle Tissue Types Skeletal Cardiac...

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