How do these issues compare and contrast with priority issues in the United States, as identified by the EPA? Which environmental priorities do you think are the most important for the world to address?

when you breathe in, or inhale, your diaphragm contracts (tightens) and moves downward. this increases the space in your chest cavity, into which your lungs expand. the intercostal muscles between your ribs also enlarge the chest cavity. they contract to pull your rib cage both upward and outward when you inhale.

carbon atoms, hydrogen, oxygen, and nitrogen.

more words for this could be abiotic and biotic

abiotic: living organisms within an ecosystem

biotic: non-living organisms within an ecosystem

answer transpiration;