because its flowing toward the heart,it is high co2 that why it low on oxygen,because it provides the oxygen,because the blood is very low c,because the blood is very low co2,it hasn't gone to lungs yet,blood is high in co2,the right ventricle pumps the oxygen-poo,because too much o2 can stop the heart,our blood exchanges its oxgen for co2,blood provides oxygen and nutrient.,blood provides oxygen and nutrients.,idk,it doesn't go to the lungs,hiiii,i dont know pend,i dont know!,probably causeit didnt hit the lungs yet,it doesnt go to lungs,id,because it is high on co2,