the skeletal and muscular system.
Answer:
Railing, wheelchair swing, and a handicapped seesaw
Railings can help people with wheelchairs or people in crutches to get up to a place easier
Wheelchair swing can let people in wheelchairs have fun swinging on a swing instead of being left out bc they can't get out of their wheelchair
A handicapped seesaw can give the kids that are not able to walk the fun of going on a seesaw
Its the Chromosomes, if your talking about the human cells.
Be more specific so I can help you
