Why the blood is called river of life?

Explanation

**Step-by-Step Solution:**

1. **Definition of Blood**: Blood is a specialized connective tissue that plays a crucial role in the functioning of the body. It consists of cells suspended in a liquid matrix called plasma.

2. **Transportation Function**: Blood is often referred to as the "river of life" because it is responsible for transporting essential substances throughout the body. This includes oxygen, nutrients, hormones, and waste products.

3. **Gaseous Exchange**: Blood facilitates the exchange of gases. It carries oxygen from the lungs to the cells and brings carbon dioxide from the cells back to the lungs for exhalation.

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