National 5 Biology- HEART Questions and Answers | Latest Version | 2025/2026 | Correct & Verified

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 2 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 3 Why are the walls of the left ventricle thicker than the right ventricle? Because it needs to pump blood around the entire body What type of blood is carried by the pulmonary artery? Deoxygenated blood What type of blood is carried by the pulmonary vein? Oxygenated blood Which side of the heart deals with oxygenated blood? Left side Which side of the heart deals with deoxygenated blood? Right side What is the name of the valve between the left atrium and left ventricle? Bicuspid valve