The excretory system uses oxygen because oxygen diffuses more rapidly into the excretory system because it contains water in the urine.
The inspiratory and the expiratory reserves make up the total volume in the lungs.
To prevent back flow of blood in the heart there are __________________.
valves
The two circuits in the heart and the cardiovascular system have the same blood pressure
What does carbonic anhydrase do?
Carbonic anhydrases (CAs) catalyze a reaction fundamental for life: the bidirectional conversion of carbon dioxide (CO2) and water (H2O) into bicarbonate (HCO3-) and protons (H+)