Which of the following receives blood during ventricular systole
The correct answer and explanation is :
The correct answer is the pulmonary artery and the aorta.
Explanation (300 Words)
During ventricular systole, the contraction phase of the cardiac cycle, the ventricles contract to pump blood into the major arteries. This phase is crucial for ensuring the circulation of oxygenated and deoxygenated blood to the body and lungs.
The heart consists of four chambers: the right atrium, right ventricle, left atrium, and left ventricle. Blood flow during ventricular systole follows these steps:
- Right Ventricle to Pulmonary Artery:
- Deoxygenated blood from the right ventricle is pumped into the pulmonary artery through the pulmonary valve.
- This blood travels to the lungs for oxygenation.
- Left Ventricle to Aorta:
- Oxygenated blood from the left ventricle is pumped into the aorta through the aortic valve.
- The aorta then distributes this oxygen-rich blood to the entire body.
During ventricular systole, the atrioventricular (AV) valves (tricuspid and mitral) are closed to prevent backflow into the atria. The semilunar valves (pulmonary and aortic) are open, allowing blood to move into the arteries.
Importance of Ventricular Systole
- Maintains Circulation: Ensures continuous movement of blood through the systemic and pulmonary circuits.
- Prevents Backflow: Proper valve function prevents regurgitation of blood.
- Ensures Oxygen Delivery: Supplies oxygen and nutrients to tissues while removing carbon dioxide.
In summary, during ventricular systole, blood is ejected into the pulmonary artery (right ventricle) and aorta (left ventricle), ensuring efficient circulation and oxygenation.