The Human Heart Has Four Chambers
Two upper atria receive blood and two lower ventricles pump it out.
Hechos relacionados
Sistema Cardiovascular51 vistas
Arteries Carry Blood Away From the Heart
Veins carry blood back, though the pulmonary artery and vein are exceptions to the oxygen rule.
Sistema Cardiovascular64 vistas
The Heart Begins to Beat About Three Weeks After Conception
It is among the first organs to function.
Sistema Cardiovascular67 vistas
The Average Adult Has About Five Liters of Blood
The blood makes a full trip around the body in about a minute.
Sistema Cardiovascular43 vistas
Blood Pressure Is Measured as Two Numbers
The first is the pressure when the heart beats and the second is the pressure between beats.