Human Heart - 50 Important MCQs

 1. The human heart has how many chambers? A) 2 B) 3 C) 4 ✅ D) 5 Answer: C) 4 Explanation: The human heart has four chambers—two atria and two ventricles. 2. Which side of the heart pumps oxygenated blood to the body? A) Right side B) Left side ✅ C) Both sides D) Middle chamber Answer: B) Left side Explanation: The left side pumps oxygen-rich blood through the aorta to the body. 3. Which blood vessel carries blood away from the heart? A) Vein B) Capillary C) Artery ✅ D) Venule Answer: C) Artery Explanation: Arteries carry blood away from the heart. 4. Which chamber receives oxygenated blood from the lungs? A) Right atrium B) Right ventricle C) Left ventricle D) Left atrium ✅ Answer: D) Left atrium Explanation: Oxygenated blood enters the left atrium through the pulmonary veins. 5. Which chamber has the thickest wall? A) Right atrium B) Left atrium C) Right ventricle D) Left ventricle ✅ Answer: D) Left ventricle Explanation: It pumps blood to the entire body. 6. The normal resting h...

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