Question

Assertion (A): Blood samples are usually taken from the veins rather than the artery

Reason (R): Low Pressure in the veins

1. Both (A) and (R) are true and (R) is the correct explanation of (A)
2. (A) is true, (R) is false
3. (A) is false, (R) is true
4. Both (A) and (R) are true and (R) is not the correct explanation of (A)

Answer 1

Correct Answer - Option 1 : Both (A) and (R) are true and (R) is the correct explanation of (A)

The Correct Answer is Both (A) and (R) are true and (R) is the correct explanation of (A).

• Blood in the arteries (arterial blood) differs from blood in the veins (venous blood) mainly in its content of dissolved gases.
• Testing arterial blood shows the makeup of the blood before any of its contents are used by the body tissues.

• Veins need valves to keep the blood flowing toward the heart. These valves are particularly important in the legs and arms.
• Arteries don't need valves because the pressure from the heart keeps the blood flowing through them in one direction.