Question

If a molecule of CO2 released into the blood in your left toe is exhaled from your nose, it must pass through all of the following except If a molecule of released into the blood in your left toe is exhaled from your nose, it must pass through all of the following except
a) the pulmonary vein.
b) an alveolus.
c) the right ventricle.
d) the right atrium.
e) the trachea.

Answer 1

Answer:

a) the pulmonary vein

Explanation:

• Veins are the blood vessels that carry blood to the heart.
• Pulmonary veins are responsible for carrying oxygenated blood from the lungs back to the left atrium of the heart.
• There are two right pulmonary veins, known as the right superior and right inferior veins.
• The largest pulmonary veins are the four main pulmonary veins, two from each lung that drain into the left atrium of the heart.

1. Artery: pulmonary artery
2. Drains to: left atrium
3. Drains from: lungs
4. System: Circulatory system