O Level Biology 3 Views 1 Answers
Explain the structure of human sperm with a neat labelled diagram.
Explain the structure of human sperm with a neat labelled diagram.
Answer
The structure of human sperm is highly specialized for its role in reproduction. A typical human sperm cell consists of three main parts: the head, midpiece, and tail. Below is a detailed explanation of each component, along with a labeled diagram.
Structure of Human Sperm
1. Head
- Nucleus: Contains the haploid genetic material (23 chromosomes) necessary for fertilization.
- Acrosome: A cap-like structure at the front of the head filled with enzymes that facilitate the penetration of the egg’s outer layers during fertilization.
2. Midpiece
- Mitochondria: Packed with mitochondria that produce ATP (energy) required for the motility of the sperm.
- Centriole: Located in the neck region, it plays a role in cell division after fertilization.
3. Tail (Flagellum)
- Structure: Composed of microtubules arranged in a specific pattern (9+2 arrangement) that allows for whip-like motion.
- Function: Provides motility, enabling the sperm to swim through the female reproductive tract to reach the egg.
Labeled Diagram
Here is a simple representation of a human sperm cell:
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