Structure of Human Ventilation System

—> due to the smaller SA:V ratio of humans, they need specialised exchange system to get enough oxygen into the body and remove the waste materials from the body.

—> oxygen is needed in the body as it’s needed for respiration.

—> it’s absorbed into the blood and is transported from the lungs to the tissues for aerobic respiration where ATP is made

—> ATP is used as the universal energy currency of cells.

—> in this process, carbon dioxide is produced and has to be removed from the body

—> so it travels in the blood from the respiring tissues to the lungs.