sqadiacom:Our heart beats 100,000 times a day, pushing 5,000 gallons of blood through our body eve
sqadiacom: Our heart beats 100,000 times a day, pushing 5,000 gallons of blood through our body every 24 hours. It delivers oxygen- and nutrient-rich blood to our tissues and carries away waste. Here, we explain how this amazing organ carries out this vital work.The heart is a muscular organ roughly the size of a closed fist. It sits in the chest, slightly to the left of center. As the heart contracts, it pumps blood around the body. It carries deoxygenated blood to the lungs where it loads up with oxygen and unloads carbon dioxide, a waste product of metabolism. The heart, blood, and blood vessels combined are referred to as the circulatory system. An average human has around 5 liters (8 pints) of blood, which is constantly pumped throughout the body. -- source link