Oxygenation of Blood

Q. Which of the following organ is responsible for enriching the blood with oxygen?

1. Heart
2. Lungs
3. Kidneys
4. Brain

Q. Choose the correct option with respect to pulmonary artery.
I: It carries oxygenated blood.
II: It carries deoxygenated blood.
III: It carries blood away from the heart.
IV: It carries blood towards the heart.

1. II and IV
2. I and III
3. I and IV
4. II and III

Q. Which of the following organ is responsible for enriching the blood with oxygen?

1. Heart
2. Lungs
3. Kidneys
4. Brain

Q. Number of RBC is more in people living on hills because __________________.

1. Air is more purified
2. There is less oxygen
3. Heat is required to warm the body
4. Oxygen concentration is more

Q. Which of the following organ is responsible for enriching the blood with oxygen?

1. Heart
2. Lungs
3. Kidneys
4. Brain