Final answer:
Blood in the right ventricle arrives from the right atrium. It passes through the tricuspid valve from the right atrium, and is then pumped to the lungs for oxygenation via the pulmonary valve and trunk, not the bicuspid valve.
Step-by-step explanation:
The blood in the right ventricle arrives from the right atrium. The pathway of blood flow into the right ventricle begins when oxygen-depleted blood from the body returns to the heart and enters the right atrium via the superior and inferior venae cavae. From there, it passes through the tricuspid valve, also known as an atrioventricular valve, which prevents the backflow of blood.The blood in the right ventricle arrives from the pulmonary valve. When the right ventricle contracts, it ejects blood into the pulmonary trunk, which branches into the left and right pulmonary arteries that carry it to each lung. The pulmonary valve prevents backflow of blood from the pulmonary trunk back into the right ventricle.
The right atrium contracts, pushing blood through the tricuspid valve into the right ventricle. When the right ventricle contracts, it propels the blood toward the pulmonary circuit by pushing it through the pulmonary valve into the pulmonary trunk, which divides into the left and right pulmonary arteries leading to the lungs where it is re-oxygenated.The bicuspid or mitral valve is not involved in this part of the circulatory process as it controls blood flow from the left atrium to the left ventricle, which is a distinct pathway pertaining to oxygenated blood coming from the lungs.