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Skeletal System

Skeletal System. Mr. Gerlach’s 7 th Grade Health Education. The Skeletal System in Action !!. The Skeletal System in Action!. 1. Movement: Skeletal system provides points of attachment for muscles. Your legs and arms move when the muscles pull on the bones.

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Skeletal System

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  1. Skeletal System Mr. Gerlach’s 7th Grade Health Education

  2. The Skeletal System in Action !! • The Skeletal System in Action!

  3. 1. Movement:Skeletal system provides points of attachment for muscles. Your legs and arms move when the muscles pull on the bones. 2. Support: The backbone is the main support center for the upper body. It holds your head up and protects your spinal cord. Muscle attached to bones!! 5 Functions of the Skeletal System

  4. 3. Protection:The bones of your skull protect your brain. Your ribs protect your lungs and heart from injury. 4. Makes Blood:Red and white blood cells are formed by tissue called marrow, which is in the center of the bone. 5 Functions of the Skeletal System

  5. 5. Storage: Bones store minerals, such as calcium and phosphorus, for use by the body 5 Functions of the Skeletal System

  6. Axial Skeleton: The axial skeleton includes the skull, spine, ribs and sternum. Appendicular Skeleton: The appendicular skeleton includes the appendages of the body, which are the shoulders, arms, hips, and legs. Two Major Skeletal System Parts

  7. Skeletal System Bones • Four basic bone shapes • 1. Long- arms, legs and fingers • 2. Short- wrist and ankles • 3. Flat- skull and sternum • 4. Irregular- spine

  8. Typical Four Layers: Periosteum: Covers Bones Compact Bone: Lies beneath the periosteum Spongy Bone: Lies beneath the compact bone Bone Marrow: Fills the gaps between the spongy bone Bone Structure

  9. Some are thicker than others!!! Bones of the Cranium

  10. Cranium Bones Parietal Bone Parietal Bone Frontal Bone Temporal Bone Occipital Bone

  11. Maxilla and Mandible ? Maxilla Mandible

  12. The clavicle, or collar bone, holds the shoulder joint away from the rest of the upper body and is only as thick as your little finger. Clavicle or Collarbone

  13. The scapula is located on the back side of the ribcage and helps provide part of the shoulder joint and movement for the arms. Scapula

  14. 1) The cervical region (neck bones)  2) The thorasic region (what the ribs attach to) 3) The lumbar region (the lower part of the back) Vertebral Column or Spinal Cord

  15. Coccyx and Sacrum

  16. Humerus (Upper Arm Bone)

  17. Radius and Ulna • Radius on Top • Ulna on Bottom

  18. Carpals or (Wrist Bones)

  19. Metacarpals (Top of Hands)

  20. Phalanges (Little Fingers)

  21. Rib Cage

  22. Sternum (Breastbone)

  23. Pelvis (Dancing Bone)

  24. Femur (Largest Bone in the Body)

  25. The Tibia and Fibula

  26. Tarsals

  27. Metatarsals

  28. Phalanges

  29. Calcaneous

  30. Skeletal System Review My Videos\wholebodyskeleton.mov

  31. Ball and Socket Joint:Round end of bone fitting snuggly within another bone. Ex. Shoulder and Hip Joints of the Body

  32. Hinge Joint: Movement at joint in one direction like a door. Ex. Knee and Elbow Joints of the Body

  33. Pivot Joint:Bone resting atop another bone permitting free movement. Ex. Neck, Wrist and Ankles Joints of the Body

  34. Fixed Immovable:Joint does not move Ex. Skull Gliding Joint:Bones slipping over other bones with a free flowing movement. Ex. Knuckles Joints of the Body

  35. Ligaments:Connect bone to bone The Connectors of the Body

  36. The Connectors of the Body!! • Tendon:Attaches muscles to bones

  37. The Connectors of the Body • Cartilage: It acts as a cushion between bones at a joint and protects the bones.

  38. Fracture: Break Dislocation: Out of joint Problems of the Skeletal System

  39. Sprain: Swelling in the joint Arthritis: Inflamed and stiff joints Problems of the Skeletal System

  40. Scoliosis: Curvature of the spine Osteoporosis: Brittle bones Problems of the Skeletal System!!

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