Question

Why an injection is administered in a vein and not in an artery?

• A. Veins have valves that prevent backflow of blood.
• B. Pressure inside arteries is high and puncture will lead to a lot of blood loss.
• C. Veins carry oxygen-rich blood from all parts of the body to the heart.
• D. Arteries carry carbon dioxide-rich blood to all parts of the body from the heart.

Answer 1

The correct option is B Pressure inside arteries is high and puncture will lead to a lot of blood loss.

In veins blood flows at a relatively low pressure compared to oxygenated blood being pumped through arteries at a higher pressure. So, if the artery is punctured with a needle this will lead to a lot of blood loss. So injections are mainly administered through the vein rather than an artery.