Final answer:
The right ventricle of the heart pushes blood to the lungs through the pulmonary artery, a key vessel in the pulmonary circulation system that also includes the pulmonary trunk and the left and right pulmonary arteries.
Step-by-step explanation:
The right ventricle pushes blood to the lungs through the pulmonary artery. This artery starts as the pulmonary trunk, which then bifurcates into the left and right pulmonary arteries. These arteries carry deoxygenated blood to the lungs for gas exchange.
After oxygenation, the blood returns to the heart via the pulmonary veins. The pulmonary trunk and arteries are a crucial part of the pulmonary circulation, which is the system of vessels that carry blood from the right side of the heart to the lungs and back to the left side of the heart.
To elaborate on the full circuit of blood flow: Blood flows from the right ventricle into the pulmonary trunk, which divides into left and right pulmonary arteries. After oxygen exchange in the lungs, oxygen-rich blood returns to the heart through the pulmonary veins, entering the left atrium.
From here, the blood is pumped into the left ventricle and then through the aorta to the rest of the body via other arteries. After supplying oxygen to the body, deoxygenated blood returns to the right atrium via veins, completing the circuit.