Skeletons 0.0 / 5 ? BiologyCells, tissues and organsGCSEOCR Created by: Gemma lovellCreated on: 15-04-13 13:58 what are the uses of internal skeletons? They provide a framework and shape, grow with the body, easy to attach muscles to and have joints to allow flexiblity 1 of 16 What are insects external skeletons made out of? Chitin 2 of 16 Long bones have a holllow shaft, this means.... They weigh less and are stronger than solid bones 3 of 16 What is ossification? during growth, the cartilage is replaced by calcium and phosphorus salts. This makes the bone hard. 4 of 16 What is a simple fracture? When the bone breaks cleanly 5 of 16 What is a greenstick fracture? When the bone doesn't break completely 6 of 16 What is a compound fracture? When the bone breaks through muscle and skin 7 of 16 What is the condition in which bones are weakened and break more easily called? Osteoporosis 8 of 16 what is a joint? Where two or more bones meet 9 of 16 What is the use of ligaments? To join bones to other bones 10 of 16 What do tendons do? Attach muscle to bone 11 of 16 What is a fixed plate? bony plates are fused together in the skull 12 of 16 What is a hinge joint? They bend in only one direction, eg. elbows and knees 13 of 16 What is a ball and socket joint? They are a joint that allows rotation, eg. shoulder and hip 14 of 16 what do the bicep and tricep do when the arm bends? The bicep contracts and the tricep relaxes (they're antagonistic muscles) 15 of 16 what do the bicep and tricep do when the arm is straightened? The tricep contracts and the bicep relaxes (they're antagonistic muscles) 16 of 16
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