Multiple choice

The interchange of oxygen and carbon dioxide between the blood and tissues is called

  1. excretion

  2. respiration

  3. perspiration

  4. None of these

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Respiration is the biological process of gas exchange - oxygen enters tissues and carbon dioxide is removed through blood circulation. Excretion removes waste, perspiration cools the body through sweat.