Blood Pressure Is Measured as Two Numbers
The first is the pressure when the heart beats and the second is the pressure between beats.
Related Facts
Cardiovascular System14 views
Arteries Carry Blood Away From the Heart
Veins carry blood back, though the pulmonary artery and vein are exceptions to the oxygen rule.
Cardiovascular System19 views
The Heart Begins to Beat About Three Weeks After Conception
It is among the first organs to function.
Cardiovascular System20 views
The Average Adult Has About Five Liters of Blood
The blood makes a full trip around the body in about a minute.
Cardiovascular System16 views
William Harvey Described the Circulation of Blood in 1628
His book showed that blood circulates around the body rather than being consumed.