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Axial skeleton: skull (cranium and facial bones) hyoid bone (anchors tongue and muscles associated with swallowing) vertebral column (vertebrae and disks)

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Presentation on theme: "Axial skeleton: skull (cranium and facial bones) hyoid bone (anchors tongue and muscles associated with swallowing) vertebral column (vertebrae and disks)"— Presentation transcript:

1 Axial skeleton: skull (cranium and facial bones) hyoid bone (anchors tongue and muscles associated with swallowing) vertebral column (vertebrae and disks) bony thorax (ribs and sternum) Appendicular skeleton: pectoral girdle (clavicles and scapulae) upper limbs (arms) pelvic girdle (sacrum, coccyx) lower limbs (legs) Articulation- where joints meet, connect, and are formed. Regions of the Human Skeleton

2 22 bones in skull 6 in middle ears 1 hyoid bone 26 in vertebral column 25 in thoracic cage 4 in pectoral girdle 60 in upper limbs 60 in lower limbs 2 in pelvic girdle 206 Bones in a Human Adult Skeleton

3 The Axial Skeleton Slide 5.20a  Forms the longitudinal part of the body  Divided into three parts  Skull  Vertebral column  Bony thorax

4 The Axial Skeleton

5 Bones of the Skull- Frontal View (10.4) Cranium: -8 sutured bones -Encases brain -Muscle attachment -Sinuses Facial bones: -13 sutured bones -1 mandible

6 Bones of the Skull- Lateral View (10.1)

7 Human Skull: Inferior Superficial View (10.2)

8 Human Skull: Superior View of the Floor of Cranial Cavity (10.3) Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings

9 The Fetal Skull: Superior View (10.9) Skull bones are still incomplete Fontanels (“little fountain”): Unossified remnants of fibrous membranes Pulse can be felt surging in these “soft spots” Allow infants head to be compressed slightly during birth Accommodate brain growth in fetus & infant Anterior fontanel remains soft until yrs of age Others are replaced by bone by the end of the first year

10 Fetal Skull: Lateral View (10.9)

11 Paranasal Sinuses (10.6) Mucus lined, hollow, air-filled portions of bones surrounding the nasal cavity Mucoase of sinus help to warm and humidify inspired air

12 The Hyoid Bone  The only bone that does not articulate with another bone  Anchored by narrow stylohyoid ligaments to syloid process of temporal bone.  Serves as a moveable base for the tongue Figure 5.12

13 The Vertebral Column  Vertebrae separated by intervertebral discs  Spine has a normal curvature  Vertebrae vary in size and morphology  Each vertebrae named according to location:  7 cervical vertebrae  12 thoracic  5 lumbar  1 sacrum (5 fused)  1 coccyx (4 fused)

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15 Structure of a Typical Vertebrae

16 Ribs, thoracic vertebrae, sternum, costal cartilages True ribs -directly attached to sternum (1 st seven pairs Three false ribs are joined to the 7 th rib Two pairs of floating ribs Thoracic Cage

17 Shoulder Girdle & Upper Limb

18 Pelvic Girdle

19 Male v. Female Pelvis

20 Human Leg Bones


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