Bones grow and fuse and then they get weaker
Muscles become gradually weaker as time goes on
Nerves stop sending signals as efficiently
Reproductive system in females is unable to produce eggs for fertilization for babies in the older adulthood.
Answer:
The most important reason for learning about environmental systems is due to the fact that we should know what's going on in the world around us. If we were to travel to Asia, we should know the forests that lie there to pack appropriately. It's also important to just be aware of how the world works. It's also good to know what rock type you'll be walking on, so you can pack shoes accordingly. Overall, it's better to know the world around you than to live in ignorance.
