I only know it's a process of change of matter but I don't remember the exact types
I think it’s b because it helps the blood cells enable more oxygen and takes it to the muscles
Hope that help
The answer would be A i assume, hope this helped !
The kidneys maintain our body's water balance by controlling the water concentration of blood plasma. The kidneys also control salt levels and the excretion of urea. Water that is not put back into the blood is excreted in our urine.
In you salivary glands there is an enzyme in the saliva that begins to break down the starches of the food.
