The human Circulatory system [ Science Blog 2 ]

Do you know what is a circulatory system? A circulatory system transports material such as simple subtances, oxygen. The MRT train is also same as the circulatory system because the MRT train delivers passangers to different places while the circulatory in our bodies transports materials to the parts of our bodies. Waste materials, such as carbon dioxide, transported from where they are produced to the organs which remove them from the body. The human circulatory system is made up of the heart, blood vessels and blood. OK, I am turning in to bed, Good night, Zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz.