Question

question
which valves of the heart do not have chordae tendineae?
answer
aortic and pulmonary semilunar valves
aortic and tricuspid valves
tricuspid and bicuspid valves
pulmonary and tricuspid valves
i dont know yet

Explanation:

Chordae tendineae are fibrous cords that connect the atrioventricular valves (tricuspid and bicuspid/mitral valves) to the papillary muscles. The aortic and pulmonary semilunar valves are located at the exits of the ventricles (aorta from left ventricle and pulmonary artery from right ventricle). These semilunar valves do not have chordae tendineae. Their structure and the pressure - flow dynamics in the arteries (aorta and pulmonary artery) prevent backflow without the need for chordae tendineae.

Answer:

Aortic and pulmonary semilunar valves