Question

Which of the following statements is true ?
1. Oxygen diffuses from lungs into blood and carbon monoxide diffuses from blood into lungs
2. carbon dioxide diffuses from lungs into blood and oxygen diffuses from blood into lungs.
3. carbon monoxide diffuses from lungs into blood and oxygen diffuse from blood into lungs.
4. Oxygen diffuses from lungs into blood and carbon dioxide diffuses from blood into lungs

Answer 1

Correct Answer - Option 4 : Oxygen diffuses from lungs into blood and carbon dioxide diffuses from blood into lungs

The correct answer is Oxygen diffuses from the lungs into the blood and carbon dioxide diffuses from the blood into the lungs.

• Oxygen diffuses from the lungs into blood and carbon dioxide diffuses from the blood into the lungs.

• The pulmonary vein carrying the blood from the lungs to the left auricle has pure blood.
• The blood vessel carrying the blood from the heart towards the body is called the artery.
• In artery, there is pure blood i.e. oxygen mixed blood. Its exception is the pulmonary artery.
  • The pulmonary artery carries the blood from the right ventricle to the lungs. It contains impure blood.
• The artery carrying blood to the muscles of the heart are called coronary arteries.

• The overall passage of air in humans is as follows: Nostrils–Pharynx–Larynx–Trachea–Bronchi– Bronchioles – Alveoli–Cells–Blood.