If you get a career in any medical field then it's important to know about the functions of the body systems. Knowing about how they work will prepare you for what you need to know when you get that job. Learning these things in school helps prevent you from struggling with your career.
It really depends on what it is
Answer:
Whether they are solid rubber or filled with air, rubber balls are generally constructed in multiple parts which are then attached to each other
Explanation:
I believe the term you are looking for is puberty.
