Which chamber of the heart receives most of the blood returning from the brain?

In the human heart, the muscular structure of the ventricles enables them to

The human heart is separated into left and right sides. This type of structure provides for the

Which statement most accurately describes the human heart?

For blood to pass through the heart from the left atrium to the left ventricle, it must FIRST pass through

The concentration of oxygen is highest in the blood flowing through the

Pulmoary circulation is described as

To determine heart rate, a student should count the pulsations per minute in

The thick, muscular vessels that transport blood away from the heart are the

Which type of vessel normally contains valves that prevent the backward flow of materials?

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