Blood Circulation | MCQs

Explanation

• In the human heart, blood returning from the lungs via the pulmonary veins drains into the left atrium.
• From there, it flows through the mitral valve into the left ventricle, which pumps it out to the rest of the body through the aorta.

Explanation

The heart is the organ responsible for pumping blood throughout the human body.

It ensuring that oxygen and nutrients are delivered to tissues and organs.

Explanation

• The circulation of blood starts from the right side of the heart.
• Specifically from the right ventricle, which pumps blood into the pulmonary artery and sends it to the lungs to pick up oxygen.

Explanation

• Pulmonary veins are the only veins that transport oxygenated blood to the heart.
• Specifically from the lungs to the left atrium.