Indicate which organ system is primarily used in the following situation. Choose from the given choices below. a. muscular d. digestive g. skeletal b. circulatory e, respiratory C. nervous f. urinary 34. Prepare for a 5km run and eat lots of carbohydrates like rice to give you more energy, 35. You lift your feet and move your legs as fast as you can. 36. But you have to go to the bathroom because you drank too much water before the run. 37. Your breathing is getting faster and faster. 38. Ouch! You accidentally tripped and scraped your knee. 39. Good thing you have strong bones to protect you. 40. The heart is pumping fast as you sprint for the final 1km.
