Human Gametes - Egg vs. Sperm
Biology: Cambridge International GCSE Supplement, topic 16.4.5
Egg and Sperm Cells
There are some key differences between human sperm and egg cells:
Number
- Sperm are produced constantly and are stored in the testes in the millions.
- Much fewer egg cells are made and females are born with a limited number.
Size
- Egg cells are the largest human cells, but sperm cells are the smallest of any human cell.
Structure
- Egg cells are round but sperm cells are made of sections (head, middle and tail) and are tadpole-shaped.
Motility
- Sperm cells have tails and can move over large distances relative to their size.
- Egg cells cannot move but are wafted through the oviducts.
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