Sheeza Basharatover 4 years ago

Our impressive circulatory system

With heart at its centre,our efficient circulatory system consist of 60,000 miles of microscopic blood vessels, 5 to 6 quarts of blood, and the sundry passengers (lymph, blood cells, nutrients and more) that ride it every day. Image via: https://www.instagram.com/p/CLj8T-bH9Oh/?igshid=nn1p1hdvtzci