Answer:
Respiratory and circulatory system are two systems work together to deliver oxygen to cells throughout the body
Explanation:
The circulatory system releases the nutrients as well as the oxygen to the different cells of the body. It also comprises of heart and blood vessels which are also spreads throughout the body. In this process arteries helps to take away the blood from the body whereas the veins takes it back to the heart. In similar manner respiratory system also helps in delivering oxygen to the cells. It takes the oxygen from the environment, and delivers it in the blood stream and gives out the carbon dioxide from it.
