Vasa recta and network of blood capillaries occur in association with

Options

A. Digestive system
B. Liver lobule
C. Renal tubules
D. Skin

Answer

To solve the question regarding the association of vasa recta and a network of blood capillaries, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Terms**:
- Vasa recta refers to the straight capillaries that are associated with the renal tubules, specifically in the kidney.
- Renal tubules are part of the nephron, which is the functional unit of the kidney.

2. **Identify the Location**:
- Vasa recta are located in the renal medulla and run parallel to the loop of Henle, which is a part of the nephron.

3. **Recognize the Function**:
- The primary function of the vasa recta is to supply blood to the renal medulla and to help in the concentration of urine by maintaining the osmotic gradient.

4. **Consider Other Options**:
- The other options provided (digestive system, liver lobules, and skin) do not have a direct association with vasa recta.
- The liver lobules have their own blood supply and are not associated with vasa recta.

5. **Conclusion**:
- Based on the understanding of the functions and locations of vasa recta, we conclude that they occur in association with renal tubules.

### Final Answer:
Vasa recta and network of blood capillaries occur in association with **renal tubules**.