The region of lung through which blood vessels, nerves enter/exit the lung is

Options

A. hilum
B. cardiac notch
C. mediastinum
D. alveoli

Answer

**Step-by-Step Solution:**

1. **Understanding the Question:** The question asks for the specific region of the lung where blood vessels and nerves enter and exit.

2. **Identifying the Options:** The options provided are:
- A) Hyaluronic
- B) Cardiac notch
- C) Medial stenum
- D) Alveoli

3. **Analyzing Each Option:**
- **Option A: Hyaluronic** - This is also known as the hilum. It is a depression or fissure in the lung where structures such as blood vessels and nerves enter and exit the lung. This makes it a strong candidate for the answer.
- **Option B: Cardiac notch** - This is a depression in the left lung that accommodates the heart. It does not serve as a point for blood vessels and nerves to enter or exit the lung.
- **Option C: Medial stenum** - This is a space in the thorax that contains vessels, nerves, and lymphatics, but it is not specific to the lung itself.
- **Option D: Alveoli** - These are the tiny air sacs in the lungs where gas exchange occurs, but they do not serve as entry or exit points for blood vessels and nerves.

4. **Conclusion:** Based on the analysis, the region of the lung through which blood vessels and nerves enter and exit is the **hyaluronic (hilum)**.

5. **Final Answer:** The correct answer is **A) Hyaluronic**.

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