D. because the medical system doesn't care about how much they get you to spend on prescription drugs and als o the advances in the medical field have gone up.
I believe that knowing the functions and characteristics of the body's reproductive and nervous systems is important because the chemicals that are generated there control your metabolism, growth, water and mineral balance, and the response to stress. Hormones also affect the development of the nervous system and neutral processing for the brain.
You didn't really provide us with a list or a set of possible answers, however, generally it's very importnat that we have a good and advanced respiratory fitness as this will allow us to go up a flight of stairs faster and without getting out of breath, we are able to run for longer or just do different physical exercises for longer. When our respiratory fitness is weak, this isn't possible.
Answer:
shrugs and grip exercises doesn't use core
