Answer:
1 . when the body gets really cold . the muscles will generate heat through shivering then the blood vessels that will transfer warm blood from the organs to the cold skin ....
when the body gets hot ... your heart begins to pump faster that way it's bringing the blood closer to the serface of the skin
Step-by-step explanation:
some body systems that work to regulate body temperature is
. cardiovascular
. muscular
. and the blood vessels as well
hope this helps !!!!