The Axial Skeleton Forms the longitudinal part of

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The Axial Skeleton Forms the longitudinal part of the body Divided into three parts

The Axial Skeleton Forms the longitudinal part of the body Divided into three parts Skull Vertebral column Bony thorax Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings Slide 5. 20 a

The Skull Two sets of bones Cranium Facial bones Bones are joined by sutures

The Skull Two sets of bones Cranium Facial bones Bones are joined by sutures Only the mandible is attached by a freely movable joint Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings Slide 5. 21 a

The Skull Figure 5. 7 Copyright © 2003 Pearson Education, Inc. publishing as Benjamin

The Skull Figure 5. 7 Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings Slide 5. 21 b

Bones of the Skull Figure 5. 11 Copyright © 2003 Pearson Education, Inc. publishing

Bones of the Skull Figure 5. 11 Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings Slide 5. 22

The Hyoid Bone The only bone that does not articulate with another bone Serves

The Hyoid Bone The only bone that does not articulate with another bone Serves as a moveable base for the tongue Figure 5. 12 Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings Slide 5. 26

The Fetal Skull The fetal skull is large compared to the infants total body

The Fetal Skull The fetal skull is large compared to the infants total body length Figure 5. 13 Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings Slide 5. 27 a

The Fetal Skull Fontanelles – fibrous membranes connecting the cranial bones Allow the brain

The Fetal Skull Fontanelles – fibrous membranes connecting the cranial bones Allow the brain to grow Convert to bone within 24 months after birth Figure 5. 13 Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings Slide 5. 27 b

The Vertebral Column Vertebrae separated by intervertebral discs The spine has a normal curvature

The Vertebral Column Vertebrae separated by intervertebral discs The spine has a normal curvature Each vertebrae is given a name according to its location Figure 5. 14 Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings Slide 5. 28

Cervical Vertebrae C 1 and C 2 Cervical vertebrae C 1 is also called

Cervical Vertebrae C 1 and C 2 Cervical vertebrae C 1 is also called atlas After the Greek God Who was punished by Zeus to hold up the Heavens on his shoulders Cervical vertebrae C 2 is also called the Axis as it has a small bone that the atlas spins on Figure 5. 16 Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings Slide 5. 29

The Bony Thorax Forms a cage to protect major organs Figure 5. 19 a

The Bony Thorax Forms a cage to protect major organs Figure 5. 19 a Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings Slide 5. 31 a

The Bony Thorax Made-up of three parts Sternum Ribs Thoracic vertebrae Figure 5. 19

The Bony Thorax Made-up of three parts Sternum Ribs Thoracic vertebrae Figure 5. 19 a Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings Slide 5. 31 b

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