Question

Write a short note on different types of human cell sizes that you have studied with examples. [ 3 Marks]

Answer 1

The average human cell size varies from 0.5 to 20 µm in diameter.

1. In human body, the smallest cell is red blood cells (7 µm in diameter).[ 1 Mark]
2. The longest one is the nerve cell which reaches a length of about 90 - 100 cm.[ 1 Mark]
3. Human egg (Ovum) is 100 µm in size.[ 1 Mark]