Skeletal System. What is the skeletal system? Skeletal system consists of bones, teeth, joints, & structures that connect bones to other bones or muscles.
Post on 30-Dec-2015
Skeletal SystemWhat is the skeletal system?Skeletal system consists of bones, teeth, joints, & structures that connect bones to other bones or muscles (ligaments, tendons, & cartilage).Brainstorm What are the functions of the skeletal system? (why is it important)1. SupportMany bones provide support, but long bones especially importantActs as the frame for the rest of the body long bones in legs help support the trunk other than long bonesthe first vertebra supports the skull2. ProtectionProtect vital internal organsskull ->the brainrib cage ->heart, lungs, & abdominal organs3. MovementCombination w/muscular system, the skeletal system aids in movementSkeletal muscles are attached to bones by tendons that act as a lever to move bones.4. Mineral StorageOuter layers of bony tissues are used for the storage of minerals (primarily calcium and phosphorus)5. Blood Cell Formation & Energy StorageInner core of bone ->bone marrowRed marrow is a major site of blood cell & platelet formation.Yellow marrow ->long bones & other mature bonesYellow marrow consists mostly of fat & serves as an energy reserve.What is the purpose? Why is it important? Provides frame and supportAids movementProtects vital organsMineral storageBlood cell formationTURN AND TALK Which of the 5 functions is the most important and why? 3 cell types found in bones1. Osteoblasts form a bone structure by secreting collagen, become enclosed in the matrix, & develop into osteocytes. (BUILD NEW BONE) 2. Osteocytes - exchange of nutrients & wastes with blood (SITE OF CYTE EXCHANGE) 3. Osteoclasts secrete enzymes that digest bone. Bone is a living tissue that is continually remodeled in response to the bodys need for calcium Osteoclasts are important in the development, growth, maintenance, & repair of bone (CLASH to break DOWN OLD BONE) Short bone cube shaped, (think complex joins like the hock or knee) i.e. carpus and tarsusFlat bone plate of bone, (think thin and curved to protect organs) i.e. scapula, rib, skullIrregular bone complex shaped attached to muscles, i.e. vertebraeLong bone bone is longer that it is wide, i.e. femur, tibia, humerus, etc. (think legs/support) NOT AS COMMON IN ANIMALS EXCEPT IN PAWS/HANDSSesamoid small, seed-shaped bone, i.e. proximal and distal sesamoids, patellaTYPES OF BONEHow are bones classified?Long bones femurShort bones kneeFlat bones ribs, scapulaIrregular bones vertebraeSesamoid bones knee capTest Your KnowledgeCan you ID what type of bone each of these examples are?
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