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Ch. 4 Part 4

Ch. 4 Part 4. Muscular tissue Nervous tissue. Muscular Tissue. Consists of muscle fibers that can use ATP to generate force Function: produces body movements, maintains posture, and generates heat, provides protection 3 types Skeletal Cardiac Smooth . Skeletal Muscle Tissue.

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Ch. 4 Part 4

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  1. Ch. 4 Part 4 Muscular tissue Nervous tissue

  2. Muscular Tissue • Consists of muscle fibers that can use ATP to generate force • Function: produces body movements, maintains posture, and generates heat, provides protection • 3 types • Skeletal • Cardiac • Smooth

  3. Skeletal Muscle Tissue • Usually attached to bones • Striated – alternating light and dark bands within fibers • Voluntary – can be made to contract and relax under conscious control • Muscle fiber is cylindrical and has many nuclei

  4. Skeletal Muscle Tissue

  5. Cardiac Muscle Tissue • Forms most of the wall of the heart • Striated • Involuntary – contraction is not consciously controlled • Fibers are branched and have only one nucleus (sometimes two) • Attached by intercalated discs with gap junctions and desmosomes

  6. Cardiac Muscle Tissue

  7. Smooth Muscle Tissue • Located in the walls of hollow internal structures like: blood vessels, airways to lungs, stomach, intestines, gallbladder, urinary bladder • Nonstriated • Involuntary • Fiber is long, fat in the middle, and thin at the ends

  8. Smooth Muscle Tissue

  9. Checkpoint • Which muscles are striated and which are smooth? • Which types of muscular tissue have gap junctions?

  10. Nervous Tissue • Consists of neurons and neuroglia • Neurons (nerve cells) create electrical signals called action potentials (nerve impulses) • Send impulses to other cells of the body • Neurons have 3 basic parts • Cell body • Dendrites • Axon

  11. Nervous Tissue

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