IGCSE Biology Paper-1: Specimen Questions with Answers 165 - 165 of 208
Question 165
Question MCQ▾
The diagram shows the human heart.
Which of the following option is Correct?
P | Q | R | S | |
A | Pulmonary artery | Vena cava | Aorta | Pulmonary vein |
B | Pulmonary vein | Aorta | Vena cava | Pulmonary artery |
C | Pulmonary artery | Aorta | Vena cava | Pulmonary vein |
D | Pulmonary vein | Vena cava | Aorta | Pulmonary artery |
Choices
Choice (4) | |
---|---|
a. | A |
b. | C |
c. | D |
d. | B |
Answer
b.Explanation
- 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.