Question

IVpical ‘lub-dub’ sounds heard in heart beat are due to

• A. Closing of bicuspid and tricuspid valves
• B. Closing of semilunar valves
• C. Blood under pressure through aorta
• D. Closure of bicuspid—tricuspid valves followed by semilunar valves

Answer 1

Answer: (D)

Typical ‘lub-dub’ sounds heard in heart beat are due to closure of bicuspid-tricuspid valves followed by semilunar valves