Introduction

Living organisms must continuously perform certain maintenance functions to stay alive and prevent damage or breakdown, even when they are at rest. These essential maintenance functions are collectively referred to as life processes.

Importance of Energy

Energy Requirement

Life processes require energy to maintain living structures and perform necessary functions.

This energy is sourced from outside the organism and is transferred to the inside through a process known as nutrition.

Role of Nutrition

Nutrition involves taking in food, which serves as the energy source.