Final answer:
The nervous system sends and receives electrical signals, while the muscular and skeletal systems provide support and allow for movement.
Step-by-step explanation:
The nervous system works by sending and receiving electrical signals. The main organs of the nervous system are the brain and the spinal cord. The signals are carried by nerves in the body, similar to the wires that carry electricity all over a house. The signals travel from all over the body to the spinal cord and up to the brain, as well as moving in the other direction.
The muscular and skeletal systems provide support to the body and allow for movement. The bones of the skeletal system protect the body's internal organs and support the weight of the body. The muscles of the muscular system contract and pull on the bones, allowing for movements such as standing, walking, running, and grasping items.