Cell - Basic Unit of life | Science | Class 9 | Part3

Cell – Basic Unit of life

Cell Size

1.Cell size ranges from 0.5 micrometers to 20 micrometer

2.Cell sizes vary in different types of living beings i.e animals, plants, birds, microbes, etc. Some have large sizes & small sizes.

3.Eg. of large cells: Nerve Cell

4.Eg. of small cells: White blood cells (WBC), Red blood cells (RBC)

 

Cell Shape

Likewise, the shapes of cells also vary in different kinds of living organisms.

There are various types of cell shapes  mentioned as  below :

1.Oval – eg. Chlymydomonas

2.Rectangle – eg. typical plant cell

3.Spherical – eg. Lymphocytes

4.Spindle – eg. Muscles cell

5.Irregular – eg. Amoeba

 

Cell Structures

 

1.Plasma Membrane

2.Cell Wall

3.Protoplasm

4.Plastids

5.Mitochondria

6.Golgi Body

7.Endoplasmic Reticulum

8.Ribosomes

9.Lysosomes

10.Centrosomes

11.Vacuoles

12.Nucleus

13. Centrosome

 

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