Question

which part is the most sensitive part ofhuman body and why

Answer 1

Sensitivity is represented in the brain in the sensory cortex, which collects nerve impulses from pain receptors in the skin. This follows the homunculus pattern, which I depicted here. You can see from this that the most sensitive areas are the face, hand and fingers.

Answer 2

eyes sensitive part
because if any thing happen we will be unable to seee and causes too much pain and irritation watery liquid discharge