lungs anatomy 3d model

Respiration is the process by which nutrients that an organism has taken in are converted into energy. This is a chemical reaction and occurs in every cell in living things. Without respiration, an organism simply won't have the energy to keep all the systems within their bodies working to sustain them. Almost all organisms rely on aerobic respiration, which converts oxygen and glucose into water and carbon dioxide. This releases the energy the body requires in the process. For tiny, single-celled organisms like bacteria, the gas exchange between the vital oxygen and the waste products takes place across the organism’s cellular membrane. For multicellular life, it's a bit more complicated and usually requires a specially adapted organ. Larger multicellular land animals, such as birds and mammals, have to breathe in oxygen from the surrounding air, which travels to the lungs and is transferred into the blood. Create image for elementary students easy to understand clear all concepts Respiration is the process