The heart is a hollow organ made up of cavities called atria and ventricles. Each atrium communicates with the ventricle through an orifice that contains a valve that prevents the return of blood from one cavity to another. The name of this valve is:
A. semilunar.
B. atrioventricular.
C. pulmonary.
D. ventricular.
Answer:B
The heart is a hollow organ made up of cavities called atria and ventricles. Each atrium communicates with the ventricle through an orifice that contains a valve that prevents the return of blood from one cavity to another. The name of this valve is:
A. semilunar. B. atrioventricular. C. pulmonary. D. ventricular.