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Cells. Muscle cells презентация
Содержание
- 1. Cells. Muscle cells
- 2. Cells are the fundamental units of all living things- human, animal, plant, microbe.
- 3. The human body is a congregation of an estimated 26 trillion cells.
- 4. The cells of the human body vary
- 5. A cell is essentially a mass of
- 6. It is born (by the process of
- 7. Muscle cells stretch and contract, nerve cells carry signals.
- 8. Cells can be damaged and killed by
- 9. Nerve cells do not regenerate.
- 10. Cells can generally be classified as follows:
Cells are the fundamental units of all living things- human, animal, plant, microbe.
Слайд 5A cell is essentially a mass of protoplasm- a jellylike living
substance- circumscribed by a cell wall and containing a nucleus.
Слайд 6It is born (by the process of cell division), lives, feeds
itself and gets rid of waste products (the process called metabolism),grows, reproduces itself by division or degenerates, dies, and is replaced.
Слайд 8Cells can be damaged and killed by direct injury, by poison
from chemical substances or bacterial invasion, and by lack of foodstuff or oxygen.
