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Human muscular system
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tarix | 28.11.2023 | ölçüsü | 3,6 Mb. | | #138074 |
| muscul
Baxromova Xushnoza
Muscular system muscle - A muscle cell consists of
- - sarcolemma (membrane) –
- - sarcoplasm (cytoplasm )
- It contains myofibrils (proteins)
- Muscle tissue is divided into three groups:
- smooth
- striated skeletal
- striated cardiac
DRAW
Smooth muscle - Each cell is long, fibrous and sharp-ended with a single central nucleus
- They are regulated by the autonomic nervous system (ANS) since they are located in organs that function involuntarily
- Their function is generally irregular and slow
Smooth muscle - Smooth muscle cells participate in the structure of internal organs (digestive organs, walls of blood vessels) of humans
Cardiac muscle - The nucleus is located at the center of each cell
- Each cell has branch-like projections
- Each cell is rich in blood and lymph vessels.
Skeletal muscle - They cover the skeleton
- They provide locomotion in cooperation with the skeletal system
- Cells of striated muscles are long, cylindrical and multinucleated
Skeletal muscle - They are termed muscle fibers due to their morphological appearance
Skeletal muscle - The myofibrils composed of actin and myosin proteins
- They are arranged in parallel lines
- Striated skeletal muscle is voluntary and functions under the control of the brain
- It contracts rapidly
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