THE HUMAN HEART

The heart is basically a strong muscle that pumps blood for the body . The heart would need plenty of : nutrition , water and oxygen to keep the heart healthy . The circulatory system has three parts , which is the heart , blood and blood vessels , ( and is a vital for fighting diseases and maintaining homeostasis ) . The heart beats around 3 billion times in an average person's life. About 8 million blood cells dies every second and around every second the same amount would born .