Here are 10 one-word answer type questions from the topic Blood Vessels with their answers and explanations (each question is followed by its answer and a brief explanation):
1. Question:
Which blood vessels carry oxygen-rich blood from the heart to all parts of the body?
Answer: Arteries
Explanation: Arteries carry oxygen-rich blood at high pressure from the heart to the rest of the body. Their walls are thick and elastic to bear this pressure .
2. Question:
Which blood vessels carry carbon dioxide-rich blood back to the heart?
Answer: Veins
Explanation: Veins carry carbon dioxide-rich blood from different parts of the body to the heart. They have thin walls and valves to prevent the backflow of blood .
3. Question:
What are the smallest blood vessels that connect arteries and veins?
Answer: Capillaries
Explanation: Capillaries are very thin blood vessels that connect arteries and veins. They allow the exchange of substances like oxygen, carbon dioxide, and nutrients between blood and body tissues .
4. Question:
What is the pulse felt in our wrist due to?
Answer: Arteries
Explanation: The throbbing pulse felt in our wrist is due to the blood flowing in the arteries. It is the rhythmic expansion of arteries due to the heartbeat .
5. Question:
Which artery carries carbon dioxide-rich blood from the heart to the lungs?
Answer: Pulmonary artery
Explanation: Although arteries usually carry oxygen-rich blood, the pulmonary artery is an exception. It carries carbon dioxide-rich blood from the heart to the lungs for purification .
6. Question:
Which vein carries oxygen-rich blood from the lungs to the heart?
Answer: Pulmonary vein
Explanation: The pulmonary vein carries oxygen-rich blood from the lungs to the heart. It is an exception because veins usually carry carbon dioxide-rich blood .
7. Question:
What prevents the backflow of blood in veins?
Answer: Valves
Explanation: Veins have valves that ensure the blood flows in one direction towards the heart and does not flow backward .
8. Question:
What is the wall structure of arteries?
Answer: Thick
Explanation: Arteries have thick and elastic walls because blood flows through them at high pressure .
9. Question:
What is the wall structure of veins?
Answer: Thin
Explanation: Veins have thin walls because the blood pressure inside them is low compared to arteries .
10. Question:
Where does the exchange of oxygen and carbon dioxide occur in blood vessels?
Answer: Capillaries
Explanation: Capillaries are very thin and form a network between arteries and veins where the exchange of gases and nutrients occurs between blood and body cells .
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