Task: Class Definition Understanding (ontology: Sciences/Biology)

Which of the following definitions best describes 'cusp of cardiac valve'?

A. Either one of the pair of tubular extensions from the uterine body where the uterus and the uterine tubes meet; uterine horns are anterior Mullerian duct-derived structures.
B. Strip of cartilage that separates the coracoid from the scapula.
C. The part of the heart valves that serves to seal the heart valves when closed. There are three cusps for each valve except for the mitral valve, which has only two (hence its alternate name, 'bicuspid valve'). 'Nodules' are located at the tip of the valve, to form a tighter seal[WP].
D. Most distal cloacal compartment; function is copulation and in some species develops a penis[Kardong].

Answer: The part of the heart valves that serves to seal the heart valves when closed. There are three cusps for each valve except for the mitral valve, which has only two (hence its alternate name, 'bicuspid valve'). 'Nodules' are located at the tip of the valve, to form a tighter seal[WP].