cell-new.ppt
- 1. Cell Structure and Function
- 4. CELL PARTS
- 5. The cell has 3 basic parts: 1.Nucleus 2.Plasma membrane 3.Cytoplasm
- 6. Nucleus • The nucleus is a part of cells which is easily seen. It is very important because it controls all the activities of the other parts that occur within the cell. The nucleus contains materials that play a role in heredity.
- 7. Plasma membrane • The plasma membrane encloses the cell and separates what is inside it from its environment. It also controls what goes into and out of the cell. The plasma membrane allows entry of materials needed by the cell and eliminates those which are not needed.
- 8. Cell wall • The cell wall is made of stiff material that forms the outermost part of plant cells. This gives shape and protection to them.
- 9. Cytoplasm • The cytoplasm consists of a jelly-like substance where all the other parts of the cell are located. It does not however, include the area where the nucleus is located. Many different activities of the cell occur in the cytoplasm.
- 10. Organelles • Are distinct membrane-bound particles that includes mitochondria, smooth endoplasmic reticulum, rough endoplasmic reticulum, ribosomes, golgi body, lysosomes, vacuoles/vesicles, chloroplast, and centrioles.
- 11. Mitochondria • Converts energy into food to a form usable to the cell • The powerhouse of the cell
- 12. Ribosomes Produced in the nucleus, occurs in large numbers and can be free floating in the cytoplasm, involved in the manufacture of protein.
- 13. Rough endoplasmic reticulum • With attached ribosomes that manufacture proteins
- 14. Smooth endoplasmic reticulum • Contains no ribosomes • Makes lipids
- 15. Golgi body • Sorts, modifies, packages, and distribute cell products to where they are needed
- 17. Lysosomes • Contain digestive enzymes • Functions – Aid in cell renewal – Break down old cell parts – Digests invaders – Suicidal bag of the cell
- 18. Centrioles • Can be found in animal cell only, located near the nucleus • They help organize structures during cell division
- 19. Vacuoles / Vesicles • Vacuoles are present in both plant and animal cells. In plant cells, they are large and usually occupy more than half of the cell space. Vacuoles also store water, thereby maintaining rigidity to cells and provide support for plants to stand upright. • Vacuoles in animal cells are small and are called vesicles. They serve as storage of water and food and also function in the excretion of waste materials.
- 21. Chloroplast • Chloroplasts are important in plant cells because it is where food is made. It contains chlorophyll which absorbs energy from the sun to make food for plants.
- 22. Difference between plant cell and animal cell Cell part Plant cell Animal cell Cell wall Present Absent Mitochondria Present Present Smooth ER Present Present Rough ER Present Present Ribosomes Present Present Lysosomes Present Present Centrioles Absent Present Vacuole / Vesicle Present Present Golgi body Present Present Chloroplast Present Absent