1. There are 3 types of muscle tissue:  skeletal  smooth  cardiac

2. 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)

3. Skeletal Muscle Cells Striated, voluntary, and multinucleated
are long, thin and cylindrical; they are attached to bones and move our skeleton
Striations -- cross stripes (bands) run perpendicular to the cells
Adaptable- can change amount of force to use them ex. Picking up paper clip- tiny amount; picking up text book- 70 lbs. of force
Can regenerate from stem cells, cells do not divide

4. Skeletal Muscle Tissue

5. Cardiac Muscle Cells found in heart walls
branching cells connect at intercalated disks which allow contractions to occur faster
are regulated by pacemaker cells which control contraction of the heart muscles
striated, involuntary, and single nucleus

6. Cardiac Muscle Tissue

7. Smooth Muscle Cells are small and pointed at their ends
can divide and regenerate new cells
non-striated, involuntary, and single nucleus
found in hollow organs like the intestine, bladder, lungs, and blood vessels- Visceral
Peristalsis-move substances through hollow opening by contracting slowly; they squeeze things through like a tube of toothpaste

8. Smooth Muscle Tissue

9. 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