What is the process involved in eliminating undigested food and waste from the body?

The process involved in eliminating undigested food and waste from the body is known as excretion. Excretion plays a crucial role in maintaining the body's homeostasis by removing substances that are no longer needed or could be harmful if accumulated.

During digestion, food is broken down into absorbable nutrients, but not all of the food is digestible. The parts that remain unprocessed, along with metabolic waste, must be removed from the body to prevent toxicity and maintain overall health.

Absorption, on the other hand, refers to the process where nutrients from digested food are taken up into the bloodstream from the digestive tract. Metabolism encompasses all chemical reactions in the body that convert food into energy or building blocks for growth, but does not specifically refer to the elimination of waste.