AP BIOLOGY

Detailed explanation-1: -Removal of faeces or undigested food from the body is not an example of excretion because undigested food is not a product of metabolism. Metabolic activities generate nitrogenous waste that has to be removed from the body.

Detailed explanation-2: -Carbon dioxide, urea and water are excreted from the body in one way or the other. Removal of undigested food through the anus is not excretion. This process is called defecation.

Detailed explanation-3: -The passage of undigested food material from the body by way of the anus is called egestion. Egestion is the last step in the process of digestion in humans. The undigested food coming from the small intestine stays in the rectum and then passes out from the body via the anus.

Detailed explanation-4: -Defecation, or passing out or removing feces, is not considered an excretory process. The anus is responsible for removing undigested or inconvertible food from the alimentary canal.

Detailed explanation-5: -The materials discharged during the process of Egestion are undigested matter leftover from the process of digestion. Excretion, on the other hand, discharges metabolic waste products. This is the main Difference Between Egestion And Excretion.