Question

a lower part of the heart is called
A. atrium
B. plasma
C. red blood cells
D. white blood cells
E. cells
F. platelets

Answer 1

The lower part of the heart is called the **ventricle**. However, from the options you provided, the term that refers to a portion of the heart would be **A. atrium**, though it's not technically the lower part; it refers to the upper chambers of the heart. The correct answer with respect to lower chambers would be "ventricle," which isn't listed among your options.