Explanation:

The living substance of a cell is collectively known as protoplasm. It is a complex, highly organized and colloidal substance that constitutes the living matter of a cell. Protoplasm is found in all living cells, whether they are plant or animal cells.

Protoplasm is composed of two major components:

1. Nucleoplasm: It is the protoplasmic material that makes up the nucleus of a cell. It contains the genetic material of the cell in the form of DNA (deoxyribonucleic acid).

2. Cytoplasm: It is the protoplasmic material that surrounds the nucleus and fills the entire cell. It is composed of various organelles, such as mitochondria, ribosomes, endoplasmic reticulum, Golgi apparatus, lysosomes, and vacuoles.

Functions of Protoplasm:

1. It provides a medium for all the metabolic activities of a cell.

2. It gives shape and form to a cell.

3. It helps in the movement of materials within a cell.

4. It is responsible for the growth and reproduction of a cell.

5. It helps in the maintenance of the internal environment of a cell.

Conclusion:

In conclusion, the living substance of a cell is known as protoplasm, which is composed of nucleoplasm and cytoplasm. Protoplasm is responsible for all the metabolic activities of a cell and is essential for the growth and reproduction of a cell.

Total living substance in cell is protoplasm... protoplasm is made up of cytoplasm and nucleus / nucleoplasm... [ Protoplasm = cytoplasm + nucleoplasm ] blood is not present in cell.