Chapter 16

NCERT
Class 11
Biology
Solutions
What is the difference between excretion and egestion?

Question:

What is the difference between excretion and egestion?

Answer:

Though both remove waste, excretion deals with metabolic wastes like urea, while egestion deals with undigested food removed through the anus.

Process Type of Waste System Involved Example
Excretion Metabolic wastes (urea, CO₂) Excretory system Urine formation
Egestion Undigested food Digestive system Passing stool