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 ...

The primary responsibility of the heart is to pump blood throughout the circulatory system. As the center of the circulatory system, the heart is an essential organ for maintaining the overall ...

Poor circulation reduces blood flow to various body parts. It can cause numbness, tingling, and swelling. Conditions such as atherosclerosis, diabetes, and blood clots can cause poor circulation.