It is the _____________ that permits the compression necessary to pump large volumes of blood out of the ventricles.
A)negative pressure inside the ventricles
B)absence of oxygenated blood in the atria
C)arrangement of cardiac muscle in the heart wall
D)presence of skeletal muscle tissue in the heart skeleton
E)presence of papillary muscles in the ventricles

Question

Quizplus · Accepted Answer

The arrangement of cardiac muscle in the heart wall allows for the compression necessary to pump large volumes of blood out of the ventricles. The heart muscle fibers are arranged in spiraling bundles that contract in a coordinated fashion, creating a twisting and squeezing motion that propels blood out of the heart.

It Is the _____________ That Permits the Compression Necessary to Pump