Respiration What is respiration? It is the release of energy from food substances in living cells.
respiration §Sugar is oxidised to release energy, carbon dioxide and water are formed. §Equation: §sugar + oxygen energy + carbon dioxide + water §(i) sugar comes from food §(ii) oxygen comes from air §(iii) carbon dioxide is excreted thru’ lungs §(iv) energy is used for life processes or lost as heat (keeps body warm).
Breathing system To move air in and out of lungs for gaseous exchange. Gaseous exchange Diffusion of oxygen from lungs into blood. Movement of carbon dioxide from blood into lungs.