Explain the need for a ventilation system
Respiration - characteristic of life.
Biological meaning - release of energy. Cellular respiration goes on in every living cell. Most cells require a constant supply of oxygen to finction.
Large organisms need to maintain a gas exchange and therefore a smaller surface area over volume ration. The decrease of surface area over volume ration is rapid as the size of the organism increases.
the smaller cube:
The surface area is 6 x 1 x 1 cm2 = 6 cm…