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The main function of the skeletal system is to provide a frame and structure for your body, and it protects your organs. A Ball and socket joint is a joint used so that the bones can move in a complete circle, like your hip or shoulder. A suture joint is a joint that allows a limited amount of flexibilty and allows growth, like your skull. A hinge joint is a joint where the bones can move one way, like your elbow or knee. A Gliding joint is a joint where one bone is on top of the other, like in your foot. Bones are very strong, but they can break. Doctor's refer to this as a fracture. Bones are kind of like sticks. They can bend, but eventually, with enough force, it will break.
For the Central system, the brain is composed of three parts: the cerebrum, the cerebellum, and the medulla oblongata. The difference between the central and peripheral system is that the peripheral system contains only nerves and connects the brain and spinal cord to the rest of the body, while the central body system is made up of the brain. Two main components of the PNS: 1. sensory (afferent) pathways that provide input from the body into the CNS. 2. motor (efferent) pathways that carry signals to muscles and glands (effectors). The brain, spinal cord, and nerves are like a computer. If you think of it, the brain is the central computer that controls your body and by doing that they send out messages, which are like the nerves. These message are sent on a network, which is like the spinal cord, between your brain and your body.
Muscles are used to move your bones, pump your blood, make facial expressions, etc. If you regularyl exercise and eat nutritionally your muscles will take care of themselves. A muscle strain is simply damage done to the muscle or the tendons attatching it to the bones. A sprain is damage done to a ligament attching bones
Skeletal System
Nervous System
Muscular System
