Our heart and lungs circulate oxygen throughout our blood vessels to keep cells alive. At the center of the circulatory system is the heart, which works with the lungs to constantly keep the body ...

Your circulatory system contains three blood vessel types: arteries, veins, and capillaries. Arteries carry blood from the heart, unlike veins, which carry blood to the heart. According to the ...

The five vital organs in the human body are the brain, heart, lungs, kidneys, and liver. Other organs include the gallbladder, pancreas, and stomach. Organ systems, such as the nervous system, support ...

The cardiovascular system consists of the heart, blood vessels, and blood. Its primary function is to transport nutrients and oxygen-rich blood to all parts of the body and to carry deoxygenated blood ...

REFLECTION on the functional significance of the valves in the veins and in the heart led Colombo and Cesalpino to postulate a circulatory system in place of the long-accepted tidal flow of blood from ...