Which of the following statements is true for lymph ?

Options

A. WBCs + serum
B. Blood - RBCs and some proteins
C. RBCs + WBCs + plasma
D. RBCs + proteins + platelete

Explanation

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

### Step 1: Understand the Composition of Lymph
Lymph is a fluid that is part of the lymphatic system. It is similar to blood plasma but has some key differences.

### Step 2: Identify the Color of Lymph
Lymph is typically described as pale yellow in color. This is primarily due to the absence of red blood cells (RBCs), which give blood its red color.

### Step 3: List the Components of Lymph
Lymph contains:
- White blood cells (WBCs)
- Proteins
- Carbohydrates
- Fats
- Nitrogenous wastes

It does not contain red blood cells or platelets.

### Step 4: Compare Lymph with Blood
When blood is centrifuged, the components separate. The liquid portion that remains after removing the blood cells (including RBCs and platelets) is called serum. Lymph can be thought of as similar to serum but includes WBCs.

### Step 5: Evaluate the Statements
Now, we need to evaluate the given statements about lymph:
- If a statement claims that lymph contains WBCs and serum, it is correct.
- Any statement that includes RBCs or platelets is incorrect.

### Conclusion
The true statement about lymph is that it contains white blood cells (WBCs) and serum.

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