The Cell Presentation for Grade 7

It is the presentation about the cell for grade/class 7

1. Cell

2. About Cell Cells are the structural and functional of all living beings. They are known as the building blocks of life. Each cell contains a fluid called the cytoplasm, which is enclosed by a cell membrane. Moreover, cellular structures called cell organelles are suspended in the cytoplasm.

3. Discovery of Cell Cell was discovered by an English scientist named Robert Hook (1635 to 1703) in 1665AD which is about 358 years ago . In his book " Micrographia " published in 1665, Hooke described his observations using the compound microscope, which was a newly invented instrument at the time.

4. Cell Theory The cell theory is a fundamental principle in biology that describes the basic properties and functions of cells. Hooke discovered a multitude of tiny pores that he named cell. New cells are formed by the pre- existing cell.

5. Functions of Cell The functions of cell are listed below: i ) 1.Cells are the building blocks of all living organisms. ii) They carry out vital metabolic functions, such as energy production and nutrient processing. iii) .Cells regulate the exchange of substances with their environment. iv) .They possess genetic material that contains instructions for growth, development, and reproduction such as DNA / RNA. v).Cells can respond to stimuli and adapt to changes in their surroundings. vi).They have the ability to self-replicate, allowing for growth, repair, and the development of multicellular organisms. vii).They contribute to the formation and maintenance of tissues, organs, and organ systems.

6. Types of Cell There are two types of cell they are: Plant Cell Animal Cell

7. Plant Cell Plant cells are rigid eukaryotic cells that form the structural and functional building units of all plants. A cell is like a machine and it has many parts. The part that protects a cell in the plant is the cell membrane. It is because it forms the covering of the cell. There is one more layer to protect them because plants cannot move. This is the cell wall. There are many other parts in plant cell structure. 

8. Animal Cell An animal cell is a type of eukaryotic cell that has no cell wall and has a true nucleus, bound by membranes and other organelle cells. Animal cells vary in size from a few microns to a few millimeters. The largest known animal cell is the ostrich egg, which can stretch more than 5.1 inches in diameter and weigh 1.4 pounds (1.4 kg).

9. Structure of Cell Parts of cell are mentioned below: Cell Wall Cell Membrane Cytoplasm Vacuole Nucleus

10. Cell Wall Cell Wall is a thick, strong and rigid protective part of cell. It is also known as dead cell because it is composed of dead cell called cellulose. It is only found in plants. Function of cell Wall are listed below: It provides structure and strength in plants . It helps to transfer substances from inner to outer part of cell

11. Cell Membrane It is located inside the cell wall of a plant cell. It is made up od protein and lipid. Cell membrane is a living layer which is also called plasma membrane. It represents the outer most layer of animal cells, wheras in plant cells it is found below the cell wall. It is a semi permeable membrane (allows to pass a part of solution only). Its Function are listed below: It gives shape to cell. It protects cell organells . It permits of wanted material whereas it exit of unwanted material. The cell membrane acts as a physical barrier, separating the cell's internal environment from the external environment and protecting it from potentially harmful substances.

12. Cytoplasm Cytoplasm is the gelatinous liquid that fills the inside of a cell. It is composed of water, salts, and various organic molecules. It contains many cell organnels . Different cell organnels contain different f unction.

13. Ribosome Ribsome are small and round in shape. Ribosomes are small structures found in cells that play a crucial role in protein synthesis. Ribosomes can be found in large numbers within cells because proteins are vital for many cellular functions. Proteins produced by ribosomes are used for various purposes, such as building cellular structures, acting as enzymes, and serving as signaling molecules. Its function are: 1) I t is the site of protein synthesis in the cell. Etc …

14. Golgi Body It manufacture protein, sugar and enzymes and function include the storage. It   is a cell organelle that helps process and package proteins and lipid molecules, especially proteins destined to be exported from the cell.  Its function are listed below: 1) It transport, sorting and modification of both protein and lipid Etc …….

15. Lysosomes They are the kind of waste disposal system of cell. It is also a membrane-bound with cell organelle that contains digestive enzymes. Function of lysosomes are listed below: Removal of dead cells Help in protein synthesis. ETC….

16. Mitochondria Mitochondria are small and big both in size. It takes part in cellular respiration. The energy required for various chemical activities needed for life is released from mitochondria. It is also known as power house of the cell. Function of mitochondria are listed below: It generates energy It stores power ETC…..

17. Centrosome Centrosome is found only in animal cell. It is located close to the nucleus. It has centrioloes in it. Centrosome play an important role in formation of new cell in animal cell. Function of centrosome are listed below: It helps in Cell Division ETC …..

18. Slides by ;- Prashenjit Khanal Utsav Chandra Paudel Chartpaper art by ;- Suvekshya T amang Kripa Rai Were in group but did nothing;- Yogna karki Grishma Sapkota Sabin Tamang Slide Changing ;- Krimash Karki All group members;- Utsav Chandra Paudel Prashenjit Khanal Suvekshya Tamang Kripa Rai Yogna Karki Grishma Sapkota Sabinj Tamang Krimash Karki