Whenever you inhale your lungs fill with oxygen. That oxygen goes to your heart and acts as a fuel to make blood. You're heart then pumps it to everywhere in your body through your veins and takes back the used blood. When returned to the heart, the oxygen refreshes the red blood cells to make them usable again! When you exhale, you get rid of the Carbon Dioxide, which is basically used up oxegen, so it's useless. After you exhale, you inhale again and the process starts over again!
} I hope this helped! {
> Sorry the question was long
In prophase is when they form
In 1869, Friedrich Miescher isolated "nuclein," DNA with associated proteins, from cell nuclei. He was the first to identify DNA as a distinct molecule. Phoebus Levene was an organic chemist in the early 1900's. He is perhaps best known for his incorrect tetranucleotide hypothesis of DNA.
To sum it up the answer is yes.