Bone presentation

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An introduction to Bones for Grade 8 health

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Bone presentation

  1. 1. The Skeletal System
  2. 2. What is the Skeletal system? Your Skeletal system is all of the bones in the body and the tissues such as tendons, ligaments and cartilage that connect them. Your teeth are also considered part of your skeletal system but they are not counted as bones. Your teeth are made of enamel and dentin. Enamel is the strongest substance in your body.How does the Skeletal System help us?The main job of the skeleton is to provide support for our bodyYour skeleton also helps protect your internal organs and fragile body tissuesBones provide the structure for muscles to attach so that our bodies are able to move.Our bones have red bone marrow that make blood
  3. 3. How does the Skeletal System help us? The main job of the skeleton is to provide support for our body Your skeleton also helps protect your internal organs and fragile body tissues Bones provide the structure for muscles to attach so that our bodies are able to move. Our bones have red bone marrow that make blood cellsBone Question - Who has more bones a baby or an adult?
  4. 4. Bones have their own nerves and blood vessels, and they dovarious jobs, such as storing body minerals like calcium. Bones aremade of a mix of hard stuff that gives them strength and tons ofliving cells which help them grow and repair themselves. Periosteum - blood cells enter the bone to keep it healthy, forms new bone Compact bone - gives bone its strength Yellow bone marrow - mostly fat cells Spongy bone - filled with open spaces that has red bone marrow that makes red blood cells Answer - Babies have more than adults! At birth, you have about 300 bones. As you grow older, small bones join together to make big ones. Adults end up with about 206 bones
  5. 5. Young bones - babies bones contain cartilage thatgets slowly replaced with hard bone as the childages.Children - bones grow, the periosteum adds newbone to the outside cells on the inside of the bonedestroy cells.Middle Age - bone loss increases faster thatgrowthExercise puts a strain on bones and helpsthem to become stronger. vitamins A, C, andD are also important for bones.
  6. 6. Common ScientificName Nameskull craniumjawbone mandiblecollarbone clavicleshoulder scapulabladebreast bone sternumfunny bone humerusspine vertebraehips pelviswrist carpalsthigh bone femurkneecap patellashin bone tibiaankle tarsals
  7. 7. Bone Joints Your skeleton has over 200 joints. Joints are where bones come together.Ligaments are strong inelastic bands of connective tissue that help hold bonestogether at jointsWhere the bones come together at joints there is a cushion of cartilage that helps protectthe bones. Cartilage helps to prevent the bones from rubbing against each other andwearing down the bone
  8. 8. Types of JointsPivot - Pivot joints allow for rotation such as the neckBall And Socket - in which the spherical head of one bone lodges in the spherical cavity ofanother. In the shoulder joint, the humerus (upper arm bone) fits into the socket of theshoulder bladeHinge - found in the elbows and the joints of the fingers and toes. Hinge joints allowmovement in only one direction. The hinge joint of the knee, the bodys largest jointSaddle - allows movement in two directions. The saddle joint gives the human thumb theability to "cross over" the palm of the hand.Gliding - Lets bones slide over one another like in the wrist and ankle
  9. 9. TendonsConnect Muscle to Bone
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