I think it might be hormones not sure.
Answer:
Right atrium, right ventricle, left atrium, and left ventricle.
A set considered the amount of repetitions that were completed in one exercise. A repetition is the each individual time that the person doing that exercise.
Example: I do a set of 4 bicep curls. Each set will be 10 repetitions. That means I will do 10 bicep curls, 4 different times to total 40 bicep curls.
A because your always going to do more stuff by yourself then with others
