In PE coach tells you you will be running a mile today so he wants you to warm up and stretch. Coach has the class line up at the starting line and yells GO! As you run, you breathe harder to bring in more oxygen. Your heart begins pumping faster to send that oxygen to your body’s cells. Your blood picks up the gas waste products from your cells and delivers it back to the lungs to be removed.

Please tell me which systems are working together to help sustain your body as you exercise in PE. You should have a minimum of 3 for partial credit.

answer;

d. are made mostly of liquid

explanation;

-the general   composition and structure planets includes; they have a thick gas and liquid layer covering a small,solid core. mostly the gases are hydrogen and helium atmosphere and layers of liquid hydrogen. for instance neptune and uranus are examples of the outer planets, they have a core covered by ice and ammonia.

-neptune's atmosphere is hydrogen and helium with a bit of methane so there is no oxygen to breath and the interior is made up of frozen water and ammonia with a rock and iron core. thus, there is no liquid water or solid surface to survive.

k2s for potassium sulphide