5.2 functions of skeleton

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1. Secondary Two Topic: Bones and Joints Sub Topic: Functions of Skeleton 2. Students will understand the functions of the skeleton. Students will be able to list the four types of bones and state an example for each type. 3. Long bones Short bones Flat bones Irregular bones 4. One conversation No sleeping Putting of palm on whiteboard Class too noisy and need to quieten down 5. Todays Lesson Get into house level Each house will be required to research on a type of bone and present the findings during second period Cypress Long bone and its functions Jacaranda Short bone and its functions Aspen Flat bone and its functions Carova Irregular bone and its functions 6. Before we start Which type of bone is this? This is the skeleton of our hand Ans.: Long bone 7. Group Discussion At the end of the discussion, each group will be an expert in the type of bone assigned. Everyone in the group must be able to: Describe the type of bone assigned. List an example of the type of bone assigned. Name a function of the type of bone assigned. 8. PRESENTATION TIME! 9. LONG BONE Cypress House 10. Long Bone Bones that have diaphysis, epiphysis and a hollow centre. Cylindrical in shape, which gives rise to the name long bone. Need not be physically long. Eg. Phalanges (fingers), upper and lower arms / legs, etc. 11. Long Bone Long bones generally used for actions that require long range of movements, eg. tossing of ball Act as a lever to efficiently bring about rapid movement. Long bones also determine height, shoe size, etc 12. Which are the long bones? 13. SHORT BONE Jacaranda House 14. Short Bone Small and squat. Spongy bone covered with a thin layer of compact bone. Light and very strong. 15. Short Bone Provides movement which need a range of directions. Located mainly at wrist, ankle and knee. 16. HOW MANY BONES ARE THERE IN THE WRIST? Ans.: 8 17. FLAT BONE Aspen House 18. Flat Bone Characterised by the flatness and large surface area. Spongy bone between 2 layers of compact bone. 19. Flat Bone Protect delicate organs. Give big surface area for muscle attachments. Examples: Scapula (collar bone), cranium (skull), pelvis (hip bone), ribs. 20. IRREGULAR BONE Carova House 21. Irregular Bone Any shape of bone that does not fit into the earlier 3 categories. Spongy bones inside, compact bone outside. 22. Irregular Bone Shaped to suit the specific jobs. Example: Back bone (vertebrae) to protect spinal cord, lower jaw (mandible) to hold the teeth for chewing. 23. General Functions of Bone Shape Support Protection Movement Blood production 24. Functions of Bone Shape The skeleton gives rise to the shape of human by providing a framework. Without the skeleton, we will look like a lump of flesh. 25. Functions of Bone Support Keeps internal organs in place. Examples: Skull keeps brain in place. Chest cavity holds lungs and heart in place. Provides point of attachment for muscles. 26. Functions of Bone Support Girl born almost without bone Janelly Martinez-Amador 27. Functions of Bone Protection Protect delicate organs. Ribs protecting lungs and heart. Skull protecting brain. 28. Functions of Bone Movement Muscles are attached to bones. Muscles contract and pull the bones, which give rise to the movement. 29. Functions of Bone Blood Production Blood is produced in the marrow cavity (red marrow). Approximately 2.4 2.6 million red blood cells are produced every second. 30. Lets Recap! Name the 4 types of bones that we had covered today. What are the 5 functions of human skeleton?