Which of the following is first to receive lymphatic duct from legs

Options

A. (a) Left subclavian vein
B. (b) Right subclavian vein
C. (c) Right lymphatic duct
D. (d) Thoracic duct

Answer

To solve the question "Which of the following is first to receive lymphatic duct from legs?", we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Lymphatic System**: The lymphatic system is a network of vessels that helps in the transport of lymph, a fluid containing infection-fighting white blood cells, throughout the body.

2. **Identify the Role of the Thoracic Duct**: The thoracic duct is the largest lymphatic vessel in the body. It plays a crucial role in collecting lymph from various regions.

3. **Location of the Thoracic Duct**: The thoracic duct begins near the lower part of the spine, specifically at the level of the second lumbar vertebra. It collects lymph from the lower body, including the legs.

4. **Lymph Collection from the Legs**: The lymphatic vessels from the legs drain into the thoracic duct. This duct collects lymph from the pelvis, abdomen, and lower chest, which includes the lymph from the legs.

5. **Connection to the Circulatory System**: The thoracic duct eventually drains lymph into the bloodstream by connecting to the right and left subclavian veins. This is where the lymph re-enters the circulatory system.

6. **Conclusion**: Since the thoracic duct is the first major vessel to receive lymph from the legs, the answer to the question is the thoracic duct.

### Final Answer:
The first lymphatic duct to receive lymph from the legs is the **thoracic duct**.

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