What is in a tube of blood
Before you read
Test yourself first: 5 questions
Question 1 of 5
Which blood vessel carries oxygenated blood from the lungs back to the heart?
Answer: B. The pulmonary veins carry oxygenated blood from the lungs to the left atrium. The pulmonary artery is the exception that carries deoxygenated blood (heart → lungs).
Question 2 of 5
Which chamber of the heart pumps oxygenated blood out to the body?
Answer: D. The left ventricle is the most muscular chamber; it pumps oxygenated blood into the aorta and out to the body. The right ventricle pumps deoxygenated blood to the lungs.
Question 3 of 5
Oxygen is transported through the blood primarily by:
Answer: B. Hemoglobin, the iron-containing protein in red blood cells, binds and carries most of the blood's oxygen.
Question 4 of 5
Which type of blood vessel carries blood away from the heart?
Answer: B. Arteries carry blood away from the heart; veins return it. (Remember: Artery = Away.)
Question 5 of 5
Which blood type is considered the universal recipient?
Answer: B. AB-positive blood has all antigens and no anti-A/anti-B antibodies, so it can receive any blood type.
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