What is a gene pool? A. the liquid environment around the nucleus of a cell

B. all the available traits in a population

C. a place where your genes learn to swim

the oxygenated blood then leaves the lungs through pulmonary veins, which return it to the left heart, completing the pulmonary cycle. this blood then enters the left atrium, which pumps it through the mitral valve into the left ventricle. from the left ventricle, the blood passes through the aortic valve to the aorta.

deoxygenated blood leaves through the right ventricle through the pulmonary artery. from the right atrium, the blood is pumped through the tricuspid valve (or right atrioventricular valve), into the right ventricle.

i got you i did it ya know what it is just needing to fill this in for a quick task!