5 Steps of Respiration (Respiratory)
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5) Cellular Respiration
Breakdown of molecules at mitochondria within cells to form ATP, this uses up oxygen and produces CO2 as a by-product.
2) External Respiration
Exchange of gases between air and blood at pulmonary capillaries (Alveoli).
4) Internal Respiration
Exchange of gasses between blood and body cells at systemic capillaries. O2 out of the blood, CO2 into the blood.
1) Pulmonary Ventilation
Movement of air in and out of the lungs passage (Thorax and Diaphragm).
3) Transport of gases through blood vessels
O2 and CO2 carried in blood associated with RBC's.
