Boddities | Episode 7 | Why do our fingers get wrinkly in water?

The video explores the scientific mystery behind pruney fingers, explaining how water permeates the skin, triggering the sympathetic nervous system to constrict blood vessels, leading to wrinkling. It discusses the unique properties of glabra skin on fingertips and suggests an evolutionary purpose for improved grip in wet conditions. The video concludes with practical implications of this phenomenon.

What triggers the initial reaction in the skin when it comes into contact with water?

• The presence of hair on the skin

• The temperature of the water

• Electrical charges from nerves

• The thickness of the skin

What role do the nerves in the fingertips play in the wrinkling process?

• They cause the skin to grow hair

• They make the skin thicker

• They release chemicals that constrict blood vessels

• They increase the skin's temperature

What is the main reason for the negative pressure that causes skin wrinkling?

• The skin's natural elasticity

• The skin's reaction to cold water

• The release of chemicals by nerves

• The presence of hair follicles

What is the term used to describe the hairless skin on our fingertips?

• Glabra skin

• Follicular skin

• Dermal skin

• Epidermal skin

Why is it thought that pruney fingers might have an evolutionary advantage?

• To enhance sensitivity to touch

• To protect against UV radiation

• To improve grip on wet objects

• To help regulate body temperature