The duct opening at the tip of the nipple is

Options

A. oviduct
B. lactiferous duct
C. vulva
D. uterus

Answer

To answer the question "The duct opening at the tip of the nipple is," we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Structure of Mammary Glands**:
- The mammary glands are specialized organs in female mammals responsible for milk production and secretion.

2. **Identify the Components of Mammary Glands**:
- Each mammary gland consists of 15 to 20 lobes. Within these lobes, there are clusters of cells known as alveoli.

3. **Function of Alveoli**:
- The alveoli are responsible for the secretion of milk. They are the functional units of the mammary gland.

4. **Milk Storage**:
- The milk produced in the alveoli is stored in cavities called ampoules.

5. **Duct System**:
- The alveoli are connected to a network of tubes known as mammary tubules, which lead to the mammary duct.

6. **Lactiferous Duct**:
- The mammary duct further connects to the lactiferous duct, which is the duct that opens at the tip of the nipple.

7. **Final Answer**:
- Therefore, the duct opening at the tip of the nipple is called the **lactiferous duct**.