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Muscle tissue & nervous tissue

Muscle tissue & nervous tissue. Tissues - 3. Essential Question. How does form follow function in muscle and nervous tissue?. Muscle Tissue. Has cells that are contractile & excitable Comes from mesoderm Cells called muscle fibers. 3 types of muscle. Skeletal Cardiac Smooth.

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Muscle tissue & nervous tissue

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  1. Muscle tissue&nervous tissue Tissues - 3

  2. Essential Question • How does form follow function in muscle and nervous tissue?

  3. Muscle Tissue • Has cells that are contractile & excitable • Comes from mesoderm • Cells called muscle fibers

  4. 3 types of muscle • Skeletal • Cardiac • Smooth

  5. Skeletal Muscle • Voluntary • Striated • multinucleated • Packaged by CT • Each muscle is an organ • Most connect to a bone & contraction causes bone to move

  6. Cardiac Muscle • Involuntary • Striated • Found only in heart • Cell junctions: intercalated discs • Gap junctions that allows ions pass directly into neighboring cells for transmission of nerve impulse

  7. Smooth Muscle • Involuntary • Nonstriated • Found in walls of organs • Found all thru GI tract • Contracts in waves called peristalsis • Keeps food moving thru

  8. Nervous Tissue • Irritable • Conductive • Comes from endoderm • Cells called neurons

  9. Supporting Cells • Support neurons • In CNS • Astrocytes • Microglia • Oligodendocytes • Ependymal cells • In PNS • Schwann cells • Satellite cells

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