Some links may have information on several systems. The Human Anotamy Center Online. The skeleton system moves, supports, and protects the body. Blood cells are manufactured inside the bones, and calcium and phosphorus are stored in the bone tissue. The muscular system works with the bones to make the body move.
Muscles also protect some of the body's organs.
The integumentary system forms the body's outer protective layer. It consists of the skin, hair, and nails. The digestive system includes the tube running from the mouth through the trunk and several accessory organs. In this system, food is broken down into essential nutrients, nutrients are absorbed, and solid wastes are eliminated. The circulation system transports nutrients, gases, and chemicals to all prats of the body.