The 3 main regions of the brain are the cerebrum, cerebellum, brainstem.
<span>Distance vs. Time Graph
x-axis (horizontal)= Time
y-axis (vertical)= Distance</span>
Answer:
Basically, the Atrioventricular valves are Mitral and Tricuspid valves located between the atrium and ventricles. Their main functions is to “prevent the backflow of blood from the ventricles into the atrium during the ventricular contraction (systole).
Explanation:
B because the periodic table tells you the groups of the elements
