Lymphatic vessels carry chylomicrons into blood stream through

Options

A. right sub clavian artery
B. postcaval vein
C. hepatic portal vein
D. left subclavian vein

Answer

**Step-by-Step Solution:**

1. **Understand the Role of Lymphatic Vessels**: Lymphatic vessels are part of the lymphatic system and play a crucial role in transporting lymph, which includes chylomicrons. Chylomicrons are lipoprotein particles that transport dietary lipids from the intestines to other locations in the body.

2. **Identify the Function of Chylomicrons**: Chylomicrons are formed in the intestinal mucosa after the digestion and absorption of fats. They are released into the lymphatic system and eventually enter the bloodstream.

3. **Locate the Entry Point into the Bloodstream**: The lymphatic vessels carry chylomicrons and transport them to the bloodstream. The key point of entry for these chylomicrons into the bloodstream is through the subclavian veins.

4. **Differentiate Between the Options**:
- **Right Subclavian Artery**: This is an artery that supplies blood to the right arm and does not carry chylomicrons.
- **Postcaval Artery**: This term refers to the inferior vena cava, which carries deoxygenated blood to the heart, not chylomicrons.
- **Hepatic Portal Vein**: This vein carries blood from the gastrointestinal tract and spleen to the liver, but it does not carry chylomicrons directly.
- **Left Subclavian Artery**: Similar to the right subclavian artery, this is also an artery and does not carry chylomicrons.

5. **Conclusion**: The correct answer is that lymphatic vessels carry chylomicrons into the bloodstream through the **left subclavian vein** (which is often implied when discussing the entry of lymph into the bloodstream).

**Final Answer**: Lymphatic vessels carry chylomicrons into the bloodstream through the left subclavian vein.

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