Your heart functions in your body as a(n)
a. series of joints responsible for endurance.
b. muscle that to pump oxygen around the body.
c. organ for absorbing vitamins and minerals.
d. filter for impurities.

Match the correct terms to their descriptions a system in which only energy but not matter is exchanged frozen water in snow part of geosphere that includes only soil a thin layer between the troposphere and the stratosphere cryosphere tropopause closed system pedosphere