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Muscle Tissue: composed of cells (‘fibers’) specialized for contraction Skeletal . Muscle Tissue: composed of cells (‘fibers’) specialized for contraction Skeletal Cardiac. Muscle Tissue: composed of cells (‘fibers’) specialized for contraction Skeletal Cardiac Smooth.
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Muscle Tissue: composed of cells (‘fibers’) specialized for contraction • Skeletal
Muscle Tissue: composed of cells (‘fibers’) specialized for contraction • Skeletal • Cardiac
Muscle Tissue: composed of cells (‘fibers’) specialized for contraction • Skeletal • Cardiac • Smooth
Muscle Tissue: composed of cells (‘fibers’) specialized for contraction • Skeletal • Cardiac • Smooth • All muscle tissues have a reticular fiber matrix
Skeletal Muscle Tissue • Composed of closely packed skeletal muscle cells
Skeletal Muscle Tissue • Features of skeletal muscle cells: • Striated • Can be very long • Multinucleated • Cannot divide, but new cells can be produced from “satellite cells” • Require neural stimulation
Skeletal Muscle Tissue • Features of skeletal muscle cells: • Striated • Can be very long • Multinucleated • Cannot divide, but new cells can be produced from “satellite cells” • Require neural stimulation • Voluntary
Functions of Skeletal Muscle Tissue • Voluntary movement
Functions of Skeletal Muscle Tissue • Voluntary movement • Forms some sphincters
Functions of Skeletal Muscle Tissue • Voluntary movement • Forms some sphincters • Protection of some organs • Stabilization of some joints • Posture • Heat production
Cardiac muscle tissue • Features of cardiac muscle cells • Striated • Branched • Intercalated disks • Cannot divide • No satellite cells • Contract rhythmically
Cardiac muscle tissue • Features of cardiac muscle cells • Striated • Branched • Intercalated disks • Cannot divide • No satellite cells • Contract rhythmically • No neural stimulation required
Smooth muscle tissue • Composed of smooth muscle cells • Features of smooth muscle cells • Non-striated • May not require neural stimulation • Can divide • Involuntary
Functions of smooth muscle • Internal movement of food, etc. • Blood vessel diameter • Bronchiole diameter • Pupil diameter
Neural Tissue • Composed of neurons and glial cells (neuroglia)
Neural Tissue • Features of neurons
Neural Tissue • Features of neurons • Cell body (soma)
Neural Tissue • Features of neurons • Cell body (soma)
Neural Tissue • Features of neurons • Cell body (soma) • Dendrites
Neural Tissue • Features of neurons • Cell body (soma) • Dendrites • Axons (nerve fibers)
Neural Tissue • Features of neurons • Cell body (soma) • Dendrites • Axons (nerve fibers) • Cannot divide (?)