Sophie Annis 5 main functions of bone Production of blood cells The blood cells are made in the bone marrow of the bone by stem cells. The bone marrow is a soft and spongy part of the bone and its in the middle of the bone. To keep healthy you need to have plenty of blood marrow to make fresh blood cells. The large flat bones are the bones that produce the most blood cells; these are the breast bone and the pelvis. Protection Bones protect the body’s vital internal organs, they provide a cage to prevent them being damaged. They bones within the skull protect the brain and the vertebrae protects the spinal cord. The majority of the bodies bone protect organs and muscles. Support/ structure The skeleton is classed as the frame work of the body. It supports all the soft tissue of the body; it also gives the muscles somewhere to attach themselves. Movement Muscles are attached to the bones, so the bones assist the muscles in moving the body. So when the muscles contract they make the bones move. Storage of minerals Bone store minerals like calcium and phosphorus. The bone releases the minerals into the blood when the body needs it. References http://www.ivy-rose.co.uk/HumanBody/Skeletal/Skeletal_System.php