Biology Presentation For The Skeleton
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|biology presentation for the skeleton
Intro – slide 1 – acetate 1
The skeleton of a human foetus is formed from tough but flexible cartilage that acts as a blueprint for bone construction. During ossification ( the changing of cartilage to bone) which begins before birth, the cartilage is broken down and the resulting space is filled by bone building mineral salts and protein fibres secreted by bone cells.
Humans have a bony endoskeleton made up of 206 bones, although we are born with up to 300, but many of these fuse during childhood. slide 2 The skeleton is divided into two parts ; the axial and the appendiculur.
The axial skeleton consists of the skull, backbone and rib cage which forms the upright axis of the body. It helps to protect the brain, spinal cord and organs in the chest.
The appendicular skeleton consists of the upper and lower limbs and the pectoral (shoulder) and pelvis and girdles. The human pelvis is...
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