Animals use the respiratory system to breathe in oxygen and other gases and expel gases like CO2, right? O2 in, CO2 out.
It’s c ......,...,.....,,,..,..........
Roan fur in cattle, in which white and red hair is equally expressed.
Answer:
Karl Schwarzschild discovered black holes in 1916.
Hope this helps!!
Answer:
I think it might be red an white blood cells
Explanation:
red an white blood cells play a important role in transporting the proteins, minerals an oxygen all over the body through the blood vessels this is connected to the heart.
