1. Muscle tissue
Medical biology lab
25/3/2018
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2. There are 3 types of muscle tissue: skeletal smooth cardiac
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3. Classification of Muscle Cells
Striated vs. Nonstriated
striated have a banded appearance (stripes)
Single nucleus or multinucleated cells
Muscle cells can be controlled
voluntarily (consciously) or
involuntarily (automatically)
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4. Skeletal Muscle Cells Striated, voluntary, and multinucleated
are long, thin and cylindrical; they are attached to bones and move our skeleton
are usually called “muscle fibers”
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6. Skeletal Muscle Tissue
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7. Cardiac Muscle Cells striated, involuntary, and single nucleus
are called “cardiocytes” and found in heart walls
branching cells connect at intercalated disks which allow contractions to occur faster
Gap junctions couple all fibers for rhythmic contraction
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8. Cardiac Muscle Tissue
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9. Smooth Muscle Cells non-striated, involuntary, and single nucleus
are small and pointed at their ends
can divide and regenerate new cells
found in hollow organs like the intestine, bladder, lungs, and blood vessels
move substances through hollow opening by contracting slowly; they squeeze things through like a tube of toothpaste
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10. Smooth Muscle Tissue
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11. Review What You’ve Learned…
Muscle Type
Striated?
# of nuclei
Voluntary or Involuntary
Skeletal
Cardiac
Smooth
Multi-nucleated
Yes
Voluntary
Single Nucleus
Yes
Involuntary
Single Nucleus No
Involuntary
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12. Thank you
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