Question

Which of the following is a correct sequence of the flow of blood in a systemic circulation?

• A. Heart $\to$ aorta $\to$ arteries $\to$ arterioles $\to$ capillaries $\to$ tissues $\to$ venules $\to$ veins $\to$ superior and inferior vena cava $\to$ heart
• B. Heart $\to$ pulmonary artery $\to$ lungs $\to$ pulmonary veins $\to$ Heart
• C. Heart $\to$ pulmonary veins $\to$ lungs $\to$ pulmonary artery $\to$ Heart
• D. Heart $\to$ venules $\to$ veins $\to$ capillaries $\to$ tissues $\to$Aorta $\to$ arteries $\to$ arterioles $\to$ superior and inferior vena cava $\to$ heart

Answer 1

The correct option is A Heart $\to$ aorta $\to$ arteries $\to$ arterioles $\to$ capillaries $\to$ tissues $\to$ venules $\to$ veins $\to$ superior and inferior vena cava $\to$ heart

Heart $\to$ aorta $\to$ arteries $\to$ arterioles $\to$ capillaries $\to$ tissues $\to$ venules $\to$ veins $\to$ superior and inferior vena cava $\to$ heart
Systemic circulation is the movement of blood between the heart and different parts of the body.
Aorta is the artery from the left ventricle of the heart that supplies oxygenated blood to all parts of the body. The oxygenated blood entering the aorta is carried by a network of arteries which further branches into the arterioles and capillaries. The capillaries supply the oxygen to the tissues. The carbon dioxide from the tissues diffuses into the blood.
The deoxygenated blood is then collected by the venules and then carried by the veins and vena cava. The superior vena cava collects deoxygenated blood from the upper part of the body and the inferior vena cava collects deoxygenated blood from the lower part of the body. This deoxygenated blood then moves to the right atrium of the heart.

The circulation of blood between the heart and lungs via the pulmonary vein and pulmonary artery is called pulmonary circulation.