Ventricles

Science / Psychiatry / Ventricles: (ven-trih-kals) In the brain, these are four fluid-filled chambers that form a network with the spinal chord.

Heart Rate

Health / Fitness / Heart Rate: The number of times your heart beats per minute. MORE

Systole

Science / Biology / Systole: The contraction of the ventricles that opens the semilunar valve and forces blood into the arteries. MORE

Systolic Pressure

Science / Biology / Systolic Pressure: The peak blood pressure when ventricles contract. MORE

Atrioventricular (AV) Node

Science / Biology / Atrioventricular (AV) Node: Tissue in the right ventricle of the heart that receives the impulse from the atria and transmits it through the ventricles by way of the bundles of His and the Purkinje fibers. MORE

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