Which statement describes DNA?

DNA is made up of molecules called nucleotides. Each nucleotide contains a Sugar group, phosphate group, and a nitrogen base. The four type of nitrogen bases are thymine (T), cytosine (C), guanine (G), adenine (A). The order of these bases is what determine DNA.

Explanation:

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.