It pumps the blood in and out of the heart. If I remember right I think that’s it.
1. Answer: you are allowed to smoke and use alchol in the communtiy but it is not recomoened if you drive while drinking it its illegal also taking illegal drugs are too
2. the school rules do not allow you to drink or smoke because you probaly
will slack off on your studies plus homework you might also get in trouble with the police
3.the relationship of doing drugs is they all affect your mind and the way you think
4.the community laws could effect the choices of a teen choice of taking drugs because of the consequinses behind doing that.
C. A 50% oxygen saturation level of blood returning to the lungs might indicate an activity level higher than normal.
Endoskeleton I think it's a little hard to read this question
