Which of the following statements is true for lymph ?

Options

A. WBCs and serum
B. RBCs, WBCs and plasma
C. RBCs proteins and platelets
D. All components of blood except RBCs
and some proteins

Answer

To determine which statement is true for lymph, we need to analyze the characteristics of lymph compared to blood. Here’s a step-by-step breakdown:

### Step 1: Understand the Composition of Blood
Blood is composed of:
- Red Blood Cells (RBCs)
- White Blood Cells (WBCs)
- Platelets
- Plasma (which contains proteins, nutrients, and waste products)

### Step 2: Understand the Composition of Lymph
Lymph is a fluid that is part of the lymphatic system and has the following characteristics:
- It does **not** contain RBCs, which is why it is yellow in color (due to the absence of hemoglobin).
- It contains a higher concentration of WBCs compared to blood.
- It has fewer platelets and clotting factors than blood.
- It contains proteins, carbohydrates, fats, and nitrogenous wastes.

### Step 3: Analyze the Given Statements
Now, let’s analyze the statements provided:
1. **WBCs plus serum** - This is partially true as lymph does contain WBCs and some proteins (serum), but it is not just serum.
2. **RBCs plus WBC and plasma** - This is false because lymph does not contain RBCs.
3. **RBC proteins and platelets** - This is false because lymph does not contain RBCs or platelets.
4. **All components of blood except RBCs and some proteins** - This is true because lymph contains WBCs, proteins, and other components but lacks RBCs.

### Conclusion
The true statement for lymph is: **All components of blood except RBCs and some proteins**.