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

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)

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

Skeletal Muscle Tissue

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

Cardiac Muscle Tissue

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

Smooth Muscle Tissue

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