​The Skeletal System
 
Bones protect, give structure and movement and produce blood cells in the bone morrow.
 
 There are two categories of bones. Axial bones keep you upright. Appendicular bones give you movement.
 
The bone in the skull is called the cranium. It is for protecting the brain and also is a large bone forming the structure of the face.
 
The ribcage is used to protect the lungs, liver and heart. The ribs are in pairs, they are connected to the vertebrae and the ribcage although the ones at the bottom float, they are only connected to the vertebrae. Arms and legs are very similar in structure, they both have three bones. The three bones in the arm are called ulna, radius and humerus and in legs femur, fibula and tibia. The femur is the largest bone in your body.
 
Joints keep your bones together, joints are very small. Ball and socket has full circulation in your arms and legs. Hinge joints can move in two ways up and down example: elbow and knee.

​ You can keep your body strong by drinking milk eating healthy and staying fit.                                             
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The skeleton is made up of bones, which we use for protection, structure, movement and they produce blood cells in bone marrow.
 
Bones can be split up into two categories; Axial bones – bones that keep you upright such as the spinal column and hips – and Appendicular bones - -bones that help with movement such as the arms and legs. When a baby is born they have 270 bones but that number decreases to 206 when the adult reaches the age of 21.
 
Your cranium, otherwise known as the skull, is one large bone that protects the brain and helps form the facial structure.
 
The ribcage protects the lungs, heart and liver and can be seen in pairs of twelve on each side. Some ribs are fixed – fixed ribs are connected to the sternum and the vertebrae – while floating ribs are connected to the vertebrae only. The spine contains thirty-three vertebrates which run from the base of the cranium to the top of the pelvis. The spine holds the body upright and protects the spinal cord which carries nerves from the brain to other parts of the body.
 
Arms and legs have a similar structure to them. In the arm, the bone at the top is named the humorous, and the bones further down are named the ulna and radius. In the leg the thigh bone (longest bone in the body) is called the femur, and the two further down the leg are called the tibia and fibula.
 
The pelvis, also known as the hips, connect the torso to the lower body together. In your body, there are joints, the two main types of joints are the ball and socket joints, and hinge joints which are in the shoulder and pelvis, and hinge joints in your knee, elbow, wrists, ankles and knuckles.
 
To keep your bones healthy and strong, you must eat calcium rich foods, and get enough vitamin D which you receive from the sunshine.
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Niamh Patterson, 6th class, 29.1.19.