IGCSE Biology Paper-1: Specimen Questions with Answers 165 - 165 of 208

Question 165

Edit

Question

MCQ▾

The diagram shows the human heart.

Portion of the Heart

Portion of the Heart

Loading image

Which of the following option is Correct?

Which of the following option is Correct? Which of the following option is Correct?
PQRS
APulmonary arteryVena cavaAortaPulmonary vein
BPulmonary veinAortaVena cavaPulmonary artery
CPulmonary arteryAortaVena cavaPulmonary vein
DPulmonary veinVena cavaAortaPulmonary artery

Choices

Choice (4)
a.A
b.C
c.D
d.B

Answer

b.

Explanation

Portion of the Heart

Portion of the Heart

Loading image
  • Two chambers called atria are in the upper portion of the heart and receive oxygen-free blood. The valves that separate these chambers are called atrioventricular valves which is composed of the tricuspid valve on the left and the mitral valve on the right.
  • On the other hand, ventricles are chambers found on the lower portion of the heart; they pump oxygen-enriched blood into all organs of the body, reaching even the smallest cells.
  • The vessels that bring oxygen-free blood back into the heart are called veins; those that bring oxygen-rich blood away from the heart and to other body parts are called arteries. Functioning in the left ventricle, the largest artery is called aorta. The aorta is considered a main artery in the body.