Bones are the framework for your body. If you did not have them, you would lie nearly motionless on the floor like a jellyfish. Your 206 bones are all perfectly shaped to do the right job and in the right way. Each bone is somewhat different from all the others, yet perfectly designed for its task. It is connected in just the right way to perform its functions.
Your finger joints move like a door on its hinges, so are called hinge joints. Your shoulders and upper legs have ball-and socket joints, so they can turn in every direction. How could such a joint make itself by chance? You would have a difficult time working and surviving without that special joint in your shoulders and legs.
Strong, fibrous bands, called ligaments, hold your joints together, and each moving joint is lined with a membrane that secretes a fluid (synovial fluid to keep the joints “oiled” and working smoothly. The ends of each joint has over it a plate of very smooth cartilage to provide a slick surface for rotation.
Inside the bones is a spongy material called marrow. This design provides great strength, yet makes your bones much lighter in weight. Since the area inside the bones is a highly protected area, the red marrow within it contains special cells. Those cells manufacture one of the most important substances in your body: red blood!
Everyone knows that there are only 2 bones in your head: your skull and your jaw. But did you know that, at birth, you had many bones in your head? They were all movable so your head could squeeze through your mother’s birth canal. Later, they fused together. Everything was planned, carefully planned.
Your spinal bones are another total marvel. The spine is divided into a vertical stack of bones (vertebra), all carefully connected, with a central vertical hole. Through that hole a cable of nerves-your spinal cord-runs down the middle, with horizontal outlets in the vertebra so nerves can pass outward to various body parts. How could that complicated arrangement invent itself?