The valves in the heart open and close to move blood in between heart chambers. O a) three directions O b) two directions O c) four directions d) one direction
False
Some people work harder that others because their metabolisms are different and sometimes people have certain mental or physical difficulties that don’t let them do as much training and exercise as others
Answer:
I mean my teachers let people on one for projects and stuff
Explanation:
I dont know just need pts