What is the main excretory waste eliminated by the skin?
What is the main excretory waste eliminated by the skin?
CO₂
Bile-containing substances
Sweat
Sebum
Solution
The skin eliminates excretory waste through sweat produced by the sweat glands and sebum produced by sebaceous glands. The sweat is a watery fluid containing NaCl, small amounts of urea, lactic acid, etc. while sebum contains certain substances like sterols, hydrocarbons, and waxes.