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National 5 Biology- HEART Questions and Answers | Latest Version | 2025/2026 | Correct & Verified
What is the main function of the heart?✔✔To pump blood around the body
Name the type of muscle that makes up the walls of the heart.✔✔Cardiac muscle
Which chamber of the heart receives blood from the body?✔✔Right atrium
Which chamber of the heart pumps blood to the lungs?✔✔Right ventricle
Which blood vessel carries oxygenated blood from the lungs to the heart?✔✔Pulmonary vein
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Which blood vessel carries deoxygenated blood from the heart to the lungs?✔✔Pulmonary artery
Which chamber of the heart pumps oxygenated blood to the rest of the body?✔✔Left ventricle
Which chamber of the heart has the thickest muscular wall?✔✔Left ventricle
What prevents blood from flowing backwards in the heart?✔✔Valves
What is the function of the coronary arteries?✔✔To supply the heart muscle with oxygenated blood
What separates the left and right sides of the heart?✔✔Septum
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