The matrix of blood is known as

Options

A. Plasma
B. Serum
C. RBC and WBC
D. WBC and platelets

Answer

To solve the question "The matrix of blood is known as," we can follow these steps:

### Step 1: Understand the Components of Blood
Blood is a connective tissue that consists of two main components: a fluid matrix and formed elements. The fluid matrix is what we are looking for in this question.

**Hint:** Think about what the liquid part of blood is called.

### Step 2: Identify the Fluid Matrix
The fluid matrix of blood is known as plasma. Plasma is a straw-colored viscous fluid that constitutes about 55% of the total blood volume.

**Hint:** Recall the percentage of blood volume that is made up of this fluid.

### Step 3: Analyze Other Options
- **Serum**: This is the fluid that remains after blood has clotted and the clotting factors have been removed. It is not the same as plasma.
- **RBC (Red Blood Cells)**: These are the formed elements of blood, not the matrix.
- **WBC (White Blood Cells)**: Like RBCs, these are also formed elements and not the matrix.
- **Platelets**: These are cell fragments involved in clotting and are also not the matrix.

**Hint:** Eliminate the options that refer to cellular components or modified versions of plasma.

### Step 4: Conclusion
Based on the understanding that plasma is the fluid matrix of blood, we conclude that the answer to the question is **plasma**.

**Final Answer:** The matrix of blood is known as **plasma**.