The skeletal system
The human skeletal system is consisted of over 200 different bones. The longest bones of the body are found in the legs, whereas the smallest bones of the body can be found in the inner ear. Our head is protected by our skull bones. The skull bones of a young child are separate, but they grow together as the child develops. This is why the body of an adult contains fewer bones than that of a child.
The arms and hands contain a large number of bones. The bone that extends down from your shoulder is called the scapula.
The crook of your arm contains a joint. Joints are places where two bones connect with each other. The elbow joint makes it possible for us to bend and rotate our arms. It also prevents the arm from bending backwards.
Below the elbow joint, the arm continues in the form of two bones: the ulna and the radius. The radius is the bone that is found on the thumb side of your arm. By feeling your hand with your fingers, you can also locate your wrist bones, metacarpal bones and finger bones.
The backbone consists of vertebrae. The space between the vertebrae is filled with cartilage, which helps to absorb the shock the bones receive during movement.
The vertebrae of the backbone protect the spinal cord. The spinal cord contains long nerves that transport information to and from different parts of the body.
The rib cage protects your lungs and your heart. The rib cage is connected to the breastbone.
The pelvis protects your intestines. The large leg bones are called the femur, the tibia and the fibia. They are joined together by the knee joint, which is protected by a bone called the patella.
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