Chapter 14 Notes

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Chapter 14 Notes

  1. 1. Chapter 14 Support and Movement<br />
  2. 2. 14:1 The Role of the Skeleton<br />Functions of the Skeleton<br />Skeletal system is the framework of bones in your body. <br />Skeleton helps support the entire body. <br />Helps to protect certain organs.<br />Brain, Heart, and Lungs are soft tissue that can be easily damaged. <br />Skull protects brain, Ribs protect heart and lungs. <br />
  3. 3. 14:1 The Role of the Skeleton<br />Functions of the Skeleton. <br />Many bones in your body make blood cells. <br />Blood cells are made within the bone marrow. <br />Bone marrow is the soft center part of long bones. <br />Ham steak is the muscle around a pig’s thigh, and the bone in the center is the pig’s thigh bone. <br />At the center of the bone is the bone marrow. <br />
  4. 4. 14:1 The Role of the Skeleton<br />Functions of the Skeleton<br />Bones also store calcium. <br />Calcium is a mineral used by the body and is part of the bones. <br />Calcium gives bones there strength. <br />Without calcium bones would become weak or brittle. <br />
  5. 5. 14:1 The Role of the Skeleton<br />Functions of the Skeleton<br />The last job of your skeleton is to provide a place for muscles to attach. <br />a. If muscles were not attached to the bone you would not be able to move. <br />
  6. 6. 14:1 The Role of the Skeleton<br />Bones in the Skeleton<br />There are 206 bones in the human skeleton. <br />22 bones make up the human skull. <br />Common name of the bone is usually different from the medical name. <br />a. You will need to know both names! <br />Three smallest bones in the body are in the ear. <br />They measure only two centimeters long. <br />Hammer, anvil, stirrup. <br />
  7. 7.
  8. 8. End of Notes Day #1 <br />Define Key Science Words page 302<br />Homework Quiz on Key Science Words Friday January 8th, 2010<br />Both skeletons must be labeled for Thursday. <br />
  9. 9. 14:1 The Role of the Skeleton<br />Bone Growth<br />Bone tissue is alive and made of cells, just as in other organs. <br />Bone cells can reproduce (mitosis) and make more bone cells. <br />This results in bone growth. <br />As you age the size and number of bones in your body increase. (see pg 288 14-2)<br />a. An infant has 5 bones in their wrist, an adult has 8 bones in their wrist. <br />
  10. 10. 14:1 The Role of the Skeleton<br />Bone Structure: Bones are made of six types of tissue<br />Cartilage: Tough, flexible tissue that supports and shapes. <br />Acts as cushion where bones meet. <br />Does not store calcium, so it is softer. <br />Ears and tip of nose are cartilage. <br />
  11. 11. 14:1 The Role of the Skeleton<br />Outer Membrane<br />Thin sheet of tissue. <br />Has many nerves and blood vessels. <br />This is the part that hurts when bumped or bruised. <br />
  12. 12. 14:1 The Role of the Skeleton<br />Solid Bone<br />Very compact part of the bone .<br />Usually found on the outer edges. <br />Very strong. <br />Calcium stored here. <br />
  13. 13. 14:1 The Role of the Skeleton<br />Spongy Bone<br />Many empty spaces. (like a sponge)<br />Found near the ends of bones. <br />Strong like solid bone and gives the bone strength. <br />Stores calcium. <br />Bird skeletons: much of their bone tissue is spongy bone. <br />
  14. 14. 14:1 The Role of the Skeleton<br />Bone Marrow<br />Produce red and white blood cells. <br />Soft center part of the bone. <br />Ligaments<br />Tough fibers that connect bone to bone. <br />Found at joints in your body. (not that type of joint!)<br />

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