Respiratory Systems and Mechanisms

Respiration describes the metabolic process in cells that breakdown food molecules (glucose) and releases energyEnergy is the ability to do work. Energy exists in several forms such as heat, kinetic or mechanical energy, light, potential energy, and electrical energy. Units of Energy: The SI unit... More for metabolismMetabolism is the sum of the chemical reactions that take place within each cell of a living organism and that provide energy for vital processes and for synthesizing new organic material.... More.

Respiration is a two-stage process called external respiration and internal respiration. External respiration involves the exchange of gases between the organism and its environment while internal respiration, also known as cellular respiration, or tissue respiration, is the oxidation of food substances (glucose) to release energy. It is an enzyme-controlled process.