The circulatory system consists of the heart, blood vessels and blood, all three are vital in fighting disease and maintaining a healthy balance within the body. For example- Temperature and our pH balance. Our circulatory system’s main role is to transport blood around the body along with gases, hormones and nutrients to the relevant cells around the body. Our arteries, capillaries and veins once an adult are able to stretch to around 60,000 miles! 80 percent of the length is made up of the smallest of our blood vessels. Believe it or not this means that just one persons blood vessels could wrap around the circumference of the earth around 2.5 times, the circumference of the earth itself is about 25,000 miles. Mind blowing right?