Skeletal System/Bone Disease


Function of Skeletal System


provides structural support for the entire body


surrounds soft tissue- ex. ribs and sternum protect the heart and lungs, - skull protects the brain


skeletal muscle is attached to bone so it pulls on the bone when it contracts

mineral homeostasis

stores calcium and phosphorus--minerals are released into the blood when needed

blood cell production

red bone marrow produces red blood cells, white blood cells and other blood elements


storage of minerals and lipids(fats)---yellow marrow stores fat --(found in long bones)

Facts about Skeletal system

An adult's skeletal system consists 206 bones, 32 teeth and a network of other structures that connect the bones together.

The skeleton of a newborn baby has approximately 300 different components, which are a mixture of bones and cartilage.

Each hand has 27 bones, and each foot has 26, which means that together the body's two hands and two feet have 106 bones.

Most adults have 24 ribs (12 pairs), but about one in every 500 people has an extra rib, called a cervical rib.

The skeletal structure is divided into two groups named the axial skeleton and the appendicular skeleton. The axial skeleton consists of 80 bones which include the head and trunk of the human body. The appendicular skeleton is composed of over 126 bones in the lower region of the body.

The organs of the skeletal system include the bones, ligaments, tendons, and cartilage. Bones provide the framework of the body, promote mobility, and serve as protection for other organs of the body. Ligaments are fibrous tissues that connect one bone to another, thus forming a joint that allows for greater range of motion. Tendons are also composed of fibrous tissue and serve to connect muscles to the bones. Cartilage is a type of flexible connective tissue that protects the bones and helps to form body parts such as the ears and nose.

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