The musculoskeletal systems functions are to support the bodys shape, to protect important organs, to help the bodys movement, to produce blood cells

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Scott Mckeown



The musculoskeletal system

The musculoskeletal systems functions are to support the body’s shape, to protect important organs, to help the body’s movement, to produce blood cells and to store Calcium and phosphorus. The musculoskeletal system is made up of bones, cartilage, tendons and ligaments.

   There are around 213 bone sin the human body and they are all linked through tendons and ligaments. These form the protective and supportive framework for muscles. Men’s bones are usually larger and heavier than the bones that are in women. Also women’s pelvises are wider than the ones that are in men’s, this is so women can have and support their babies more.

   There are 3 types of joints that connect bones; these are fixed joints, mobile joints and ball and socket joints. Fixed joints are the joints that are between the bones in the skull. Mobile joints are like hinge joints of the elbow or pivotal joint like the joint between the first and second vertebrae. This allows the head to turn from side to side. Ball and socket joints allow the widest range of movement like the shoulder and hip joints.

   Bones contain calcium and phosphorus and these make them hard and rigid (steady). The surface on each bone is covered in periosteum which is a thin membrane and it has in it a network of blood vessels and nerves. The layer on top of this is hard and dense and is known as compact, ivory or cortical bone. The centre cavity in some bones and the spaces in some spongy bones contain fatty tissue and this is called bone marrow which contains red blood cells, platelets and almost all of the white blood cells.

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   Cartilage is not as hard as bone but it is an important part of the skeletal system because it is used mainly as connective tissue and in joints. Most of the skeleton is cartilage when a foetus in the womb which is, over time, turned into bone by a process called ossification.

   Tendons are structures like cords and they join muscles together, they are strong and flexible but they aren't elastic.

   Ligaments are an important part in the structure of joints because they bind the bone ends together and they prevent a lot of joint movement. They ...

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