What is blood? Name all the components of blood. What makes the blood look red ?

Explanation

### Step-by-Step Solution:

1. **Definition of Blood**: Blood is a fluid connective tissue that plays a critical role in connecting and transporting substances throughout the body.

2. **Components of Blood**: Blood is composed of two main components:
- **Plasma**: This is the liquid part of the blood, making up about 55% of its total volume.
- **Formed Elements**: These are the cellular components of blood, which make up about 45% of its volume. The formed elements include:
- **Red Blood Cells (RBCs)**: These cells are responsible for transporting oxygen throughout the body.
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