Heart & Circulation
This chamber pumps blood into the lungs.
Right ventricle
This structure is the primary site of gas exchange.
Alveoli
This is the functional unit of the kidney.
Nephron
This structure acts as the pacemaker of the heart.
SA node
This muscle is primarily responsible for inspiration.
Diaphragm
This hormone increases water reabsorption in the kidneys.
ADH
These vessels carry blood away from the heart.
Arteries
This substance transports most carbon dioxide in the blood.
Bicarbonate ions
This structure carries urine from the kidneys to the baldder.
Ureter
This vessel returns oxygenated blood from the lungs to the heart.
Pulmonary vein
This organs produces bile.
Liver
This male structure is the site of sperm production.
Seminiferous tubules
This is the largest artery in the body.
Aorta
This section of the small intestine receives chyme from the stomach first.
Duodenum
This hormone triggers ovulation.
Luteinizing hormone (LH)