Question

Which chamber of the human heart pumps fully oxygenated blood to the aorta and the body?

• A. Right atrium
• B. Left atrium
• C. Right ventricle
• D. Left ventricle

Hint:

Trace the path of oxygenated blood after it leaves the lungs.

Answer 1

The Correct Option is D

Step 1: Recall the path of blood through the heart.
Deoxygenated blood from the body enters the right atrium, moves to the right ventricle, and is pumped to the lungs. In the lungs, blood picks up oxygen and returns to the heart through the left atrium. From there it passes into the left ventricle.

Step 2: Identify the chamber that sends blood to the body.
The left ventricle has the thickest and strongest muscular wall of all four chambers because it must generate enough pressure to push fully oxygenated blood out through the aorta and around the entire body.

Step 3: Rule out the other chambers.
The right atrium only receives deoxygenated blood returning from the body, it does not pump blood to the aorta. The left atrium receives oxygenated blood from the lungs but passes it on to the left ventricle rather than sending it to the aorta itself. The right ventricle pumps deoxygenated blood to the lungs through the pulmonary artery, not to the aorta.

Step 4: Final answer.
The chamber that pumps fully oxygenated blood into the aorta and onward to the whole body is the left ventricle.
\[ \boxed{\text{Left ventricle}} \]