20 points question quickly . what phrase best defines a star system? a. a group of hundreds of stars b. a group of two or more stars c. a group of stars that formed around the same time d. a group of two stars in which one star is brighter than the other

Group of 2 or more stars

dgjnuuk

explanation:

is the dgjofgkg. huukkg u

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.