Tuesday February 23 rd  Today: Finish Axial Skeleton (Hyoid Bone and Spine)  EXAM GRADES WILL BE IN THE GRADEBOOK TODAY  “The past has passed, let it.

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Presentation transcript:

Tuesday February 23 rd  Today: Finish Axial Skeleton (Hyoid Bone and Spine)  EXAM GRADES WILL BE IN THE GRADEBOOK TODAY  “The past has passed, let it effing** go.”  Happy National Banana Bread Day  Fun Fact: The University of Innsbruck, Austria, has found that people who prefer their coffee black are likely to be psychopaths

Chapter 6 Bones

Hyoid Bone  Located in the neck; between the mandible and larynx  Supports and provides attachment sites for some tongue muscles

Vertebral Column aka Spine  Composed of Vertebrae  Protects the spinal cord  Serves as a point of attachment for the ribs, pelvic girdle and the muscles of the back

Vertebral Column aka Spine  Adult Spine contains 26 vertebrae  7 Cervical Vertebrae:  Cervic = neck  C1-C7 in the neck  Atlas (C1)- allows you to nod yes  Axis (C2)- Allows atlas to move side to side

Vertebral Column aka Spine  12 Thoracic Vertebrae  Thorax = chest  Articulate with the ribs  T1-T12  5 Lumbar Vertebrae:  Supports the lower back  Largest and strongest of the vertebrae  L1-L5

Vertebral Column aka Spine  1 Sacrum:  Triangular bone composed of 5 fused sacral vertebrae (immovable)  1 Coccyx:  4 fused sacral vertebrae (immovable)  Articulates with the sacrum

Vertebral Column aka Spine

 Structure of the Vertebrae  Body: thick, disk shaped front portion  Weight-bearing of the vertebra  Vertebral arch: extends backwards from the body  Spinous Process: single sharp, slender projection  Vertebral Foramen: hole which contains the spinal cord

Chapter 6 Bones

Thorax  Thorax-entire chest  Thoracic Cage: bony cage formed by the Sternum, Costal Cartilage, Ribs  Protects the thoracic organs

Thorax  Sternum: breastbone  Flat, narrow bone, made of 3 parts  Manubrium: handle-like upper part  Body: middle and largest part  Xiphoid process: lowest and smallest part  Can fracture during CPR

Thorax  Ribs  12 pairs  True Ribs (1-7): directly attached to the sternum by costal cartilage  False Ribs (8-12): costal cartilage is indirectly to the sternum or not attached at all  Floating Ribs (11, 12): only attached to the thoracic vertebrae

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