Part of sperm that passes into ovum is

Options

A. Tail
B. Acrosome
C. Head
D. Head, neck and middle piece

Answer

**Step-by-Step Solution:**

1. **Understanding the Structure of Sperm:**
- The sperm is a male gamete and has three main parts: the head, middle piece, and tail.
- The head contains the acrosome and the nucleus.

2. **Identifying the Function of Each Part:**
- The **acrosome** contains enzymes that help the sperm penetrate the outer layers of the ovum (egg).
- The **nucleus** carries the genetic material from the male.
- The **middle piece** is packed with mitochondria, which provide energy for the sperm's movement.
- The **tail** is responsible for the motility of the sperm, allowing it to swim towards the ovum.

3. **Process of Fertilization:**
- When the sperm reaches the ovum, it uses the enzymes in the acrosome to dissolve the outer membrane of the ovum.
- The tail of the sperm does not enter the ovum; it breaks down after the sperm reaches the ovum.

4. **Conclusion:**
- The part of the sperm that actually enters the ovum is the **head**, which contains the acrosome and the nucleus.

**Final Answer:**
The part of the sperm that passes into the ovum is the **head**.

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