Question

1. which statement explains why the pulmonary artery splits into two branches?

because the pulmonary vein has two functions
because the right ventricle connects two chambers
because the heart has two halves
because the pulmonary artery goes to two lungs

Explanation:

The pulmonary artery carries deoxygenated blood from the right ventricle to the lungs for oxygenation. Since there are two lungs, it splits into two branches to deliver blood to each lung. The other options are incorrect: the pulmonary vein's functions are unrelated, the right ventricle connects to one artery (not two chambers), and the heart's two halves do not directly explain the artery's branching pattern for lung delivery.

Answer:

because the pulmonary artery goes to two lungs