1st Nov '25

Respiration

Respiration is the release of from food. To do this the body takes in and .

The system consists of the organs that allow you to breathe. is the process in which your are inflated. This then allows exchange to occur. diffuses from the air into the blood and diffuses from the blood into the air.

The system consists of organs that breaks apart food into the building blocks for to make proteins and glucose for respiration. The digested food also diffuses into the .

The system consists of the heart, blood and blood vessels. It is the bodies delivery system. The oxygen and glucose diffuse from the blood into the cell's cytoplasm.

Mitochondria are organelles and it is in these, that respiration takes place. The glucose molecule is broken apart and recombined with oxygen. This release some of the energy stored in bonds of the molecules, which the cell can use to do .

Glucose + Oxygen ==> Carbon dioxide + Water + Energy

This is the word equation for aerobic respiration. It is called aerobic because it involves .

When the body requires energy but the respiratory and circulation system can't provide enough oxygen the cells can perform respiration. In this case glucose is changed to and a smaller amount of energy is released.

Glucose ==> Latic Acid + Energy

The lactic acid causes stiffness and in muscles. To remove the lactic acid the body has taken in extra oxygen. This is known as the and is why people continue to breathe heavily immediately after exercise.

Latic Acid + Oxygen ==> Carbon dioxide + Water