Same chapter3 marksDifficulty: Medium
Explain why a person of blood group O is called a universal donor.
Circulatory System
3 marksDifficulty: Medium
State three differences between an artery and a vein.
Original Khojo Papers practice question — not from a past board paper.
Answer
An artery carries blood away from the heart while a vein carries it towards the heart. An artery has thick, muscular and elastic walls and a narrow lumen, while a vein has thin walls and a wide lumen. Veins have valves along their length to prevent backflow; arteries have none except at their origin from the heart.
No citable source has been recorded for this record. Treat it as practice material, not as fact.
Explanation
The pulmonary artery and vein are the exception to the rule about oxygenated blood.
Related questions
From the same topic and chapter, at a similar level.
Same chapter3 marksDifficulty: Medium
Name the components of blood and state one function of each.
Circulatory System
Same chapter3 marksDifficulty: Medium
What is the function of the lymphatic system?
Circulatory System
Same chapter3 marksDifficulty: Medium
What is double circulation and why is it necessary?
Circulatory System
Same chapter3 marksDifficulty: Medium
Why is the wall of the left ventricle thicker than that of the right ventricle?
Circulatory System
Same chapter3 marksDifficulty: Medium
Trace the path of a drop of blood from the right atrium back to the right atrium.
Circulatory System