The heart is divided by a partition called the:
A) septum.
B) ventricle.
C) atrium.
D) pericardium
A
Explanation: A) Correct.
B) The ventricle is one of the lower chambers of the heart.
C) An atrium is one of the upper chambers of the heart.
D) The pericardium is the outer membranous sac surrounding the heart.
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