Heart, blood, arteries, veins The human body is a complex machine. Nearly 70% of it is made up of water, and every part of our body performs a different function. A vital component within the circulatory system is the cardiovascular …
Heart, blood, arteries, veins The human body is a complex machine. Nearly 70% of it is made up of water, and every part of our body performs a different function. A vital component within the circulatory system is the cardiovascular …