Muscle and Nerve Tissues

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Muscle and Nerve Tissues

• AP- BIO 1110

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Muscle Tissue

• Muscle tissue is responsible for movement of the
  body or the movement of materials through the
  body.
• Gross movement- Movement of the body such as
  running and walking
• Transport movement- Movement of materials
  throughout the body such as food through the
  digestive tract.

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Skeletal Muscle

• Skeletal muscle is named for its location. It is
  attached to bones of the skeleton.
• Made of long cells called muscle fibers that
  attach to bones by connective tissue (tendon).
  Do you remember what kind of connective tissue?
• Muscle fibers in skeletal muscle are
  multinucleated.
• The muscle fibers are cylindrically shaped.
• Proteins within cells are organized creating
  striations (alternating light and dark bands).

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Skeletal Muscle
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Smooth Muscle

• Smooth muscle lines hollow internal structures
  such as blood vessels, airways to the lungs, the
  stomach, intestines, and bladder.
• It constricts blood vessels, physically breaks
  down and moves food and moves fluid through the
  body.
• Smooth muscle tissue is not striated.
• The cells of smooth muscle have 1 nucleus.
• The cells are long with tapered ends.

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Smooth Muscle
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Cardiac Muscle

• Cardiac muscle makes up the wall of the heart.
• Cardiac tissue is striated.
• Cardiac muscle fibers are y-branched and have 1
  nucleus.
• Cardiac muscle fibers are attached end to end by
  thickened membranes called intercalated disks.

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Cardiac Muscle
intercalated disk
nucleus
striations
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Skeletal Tissue
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Smooth Muscle Tissue
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Cardiac Muscle Tissue
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Nervous Tissue

• Nervous tissue is specially designed to generate
  and transmit electric impulses.
• Neurons The functional cell of the nervous
  system.
• Sensitive to stimuli
• Consist of a central body with extensions coming
  off of it.
• Neuroglial cells Cells that are used to support
  neurons.
• Smaller and more numerous than neurons.
• Cannot transmit electrical impulses.

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Neuron structure
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Nervous Tissue
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