What are Cells?
The building blocks of all living organisms are called Cells. Our body is made up of millions of such cells together. Thus, it is said to be the basic, structural, and functional unit of life.
Cells come in different numbers to form our body or any living organism’s body. Depending on the number of cells present in the organisms, they are classified into two types:
- Unicellular Organisms – They are made up of only a single
For example, bacteria, protozoa, etc.
- Multicellular Organisms – They are made up of many
For example, humans, dogs, etc.
All the cells in the body are not uniform and look very different from each other. For example, ovum, neuron, red blood cell (RBC), etc.
They differ from one other in various factors like,
- Structures
- Shapes
- Sizes
- Functions