differentiate between striated smooth and cardiac muscle
Answers
Answer:
While skeletal muscles are arranged in regular, parallel bundles, cardiac muscle connects at branching, irregular angles, called intercalated discs. Striated muscle contracts and relaxes in short, intense bursts, whereas smooth muscle sustains longer or even near-permanent contractions.
Explanation:
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Answer:
the end of this section, you will be able to:
Differentiate between the structure and location of skeletal, smooth, and cardiac muscles
KEY TAKEAWAYS
Key Points
Skeletal muscles are attached to bones and allow voluntary movement of the body.
Smooth muscles, which generate involuntary movement, form part of the walls of the esophagus, stomach, intestines, bronchi, uterus, urethra, bladder, and blood vessels, among other portions of the body.
Cardiac muscle is involuntary and found only in the heart.
Skeletal muscle is striated in regular, parallel bundles of sarcomeres.
Cardiac muscle is striated, but the bundles are connected at branching, irregular angles called intercalated discs.
Skeletal muscle tissue is about 15% denser than fat tissue.
Glossary
cardiac muscle: The striated and involuntary muscle of the vertebrate heart.
skeletal muscle: The voluntary muscle of vertebrates, which is striated and anchored by tendons to bone, is used to effect skeletal movement such as locomotion.
smooth muscle: Involuntary muscle which is found within the intestines, throat, uterus, and blood vessel walls.
EXAMPLES
A girl is taking a walk, using her voluntary control of her skeletal muscles to move her body down the path. She decides to climb a hill and can feel the involuntary racing of her heart as she climbs the rugged slope. At the top of the hill, she takes a deep drink of water, which will eventually lead to an involuntary stretching of her bladder as she heads home.