All our body cells need to receive various hormones, vitamins, nutrients, oxygen and many other things in order to function, at the same time needing to dispose of a lot of waste products. These needs are looked after by our blood circulation, taking on the role as transporter back and forth.

 

Our blood circulation consists of blood, veins and the heart. The blood stores and transports those matters that are to be exchanged. Blood is distributed to the various organs and cells within our body by means of the veins.

 

When talking of fitness and fitness training, we usually mean oxygen uptake and thus oxygen transportation, including how to transport oxygen to the working muscles. Oxygen is transported through the blood just like any other nutrient.