Answer: produces estrogen - ovaries
Develops the immune system in childhood - thymus
Explanation:
Answer: Muscular endurance refers to the number of repetitions of a single exercise you can do without needing to stop and rest. So when you are thinking of Muscluar endurance think stamina and in that case, all of them can be correct if that is the most you can do without stopping.
I think I know the answer but I may be wrong
1.helmet
2.face shield
3.elbow pads
