cell biology ppt.pptx

This ppt is based on cell organelles

1. CELL BIOLOGY

2. SYNOPSIS INTRODUCTION UNICELLULAR AND MULTICELLULAR ORGANISMS LEVELS OF ORGANISATION CELL COMPONENTS OF CELL CELL MEMBRANE CELL WALL CYTOPLASM MITOCHONDRIA PROTOPLASM CHLOROPLAST GOLGI COMPLEX LYSOSOME CENTRIOLES ENDOPLASMIC RETICULUM NUCLEUS

3. INTRODUCTION Our earth is a beautiful place where in different types of organisms happily coexisted. From minute mosses to huge conifers invisible bacteria to huge blue whale, all have a basic unit called cell.

4. Unicellular and multicellular organisms

5. Level of organisation

6. cell The cell is the basic structural and functional unit of life. Cell is the building unit of living organisms. Our body is made up of many different kinds of cells. Each type of cell is specialized to perform a specific function.. Depending on the function cell has specific shape ,size and may have some components which other type of cells do not have.

7. Components of cell 1.CELL MEMBRANE 10. ER 2.CELL WALL 11. NUCLEUS 3.CYTOPLASM 4.PROTOPLASM 5.MITOCHONDRIA 6.CHLOROPLAST 7.GOLGI COMPLEX 8.LYSOSOME 9.CENTRIOLE

8. CELL MEMBRANE The boundary of the animal cell is the plasma membrane which is also called as cell membrane.

9. Cell wall The cell wall is formed from various compounds the main being cellulose Cellulose helps to maintain the shape of the plant cell. This allows the palnt to remain rigid and upright even if it grows to great heights. Each cell is interconnected with its neighbouring cells through openings called plasmodesmata.

10. CYTOPLASM The cytoplasm includes all living parts of the cell within the cell membrane excluding nucleus. The cytoplasm is made up of cytosol and cell organelles.

11. PROTOPLASM In particular , the material inside and outside the nuclear membrane is known as protoplasm.

12. mitochondria Mitochondria is an oval or rod shaped double membrane bound organelle. Aerobic respiratory reactions takes place within the mitochondria to release energy. It is known as the power of the cell.

13. CHLOROPLAST Chloroplast produce food from the sun’s energy. Only plants with chloroplast are able to do the photosynthesis because they contain the very important green pigment called chlorophyll. Animal cell lacks chlorophyll.

14. GOLGI COMPLEX Membrane bounded sacs are stacked on top of the other with associated secretory vesicles are collectively knowna s golgi complex. It helps in the production of secretory substances , packaging and secretion.

15. LYSOSOME Lysosome is the main digestive compartments of the cell. It lyse a cell and hence it is called suicidal bag of the cell. Centrioles are present only in animal cell and absent in plant cells. It helps in the separation of the chromosomes during cell division.

16. CENTRIOLES Centrioles generally found close to the nucleus and are made up of tube like structures.

17. ENDOPLASMIC RETICULUM ER is an inter membranous network made up of flat or tubular sacs within the cytoplasm. RER has ribosomes which helps in protein synthesis. SER helps in the synthesis of lipids.

18. NUCLEUS Plant and animal cells have nucleus inside the cytoplasm. It controls all the process and chemical reactions that takes place inside the cell. It helps to transfer the inherited character from one generation to the next generation.

19. CONCLUSION As far as cell is considered it is the basic and functional unit of life which helps in the body’s metabolism. If a cell is no longer needed then it is subjected to programmed cell death or also known as a apoptosis. Cell death usually occurs if the the cell is lysed by any chemical or molecular damage. Though life starts from cell it needs to undergo various differentiation to perform specific function .