Not sure but I think motor systems?
-Wulf
If the earth wasn't spinning , we wouldn't have summer, winter, fall, spring etc, it is important because we need the sun for certain seasons and no sun for others.
During swallowing, the air passageway of the phaynx is covered by the epiglottis
Answer:
search the answer on guizzes or guizlet
Explanation:
it will help you
