axial skeleton

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Axial Skeleton Ch. 7

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Axial Skeleton. Ch. 7. Two types of bone markings. Depressions – cavities that indent the bone Projections – processes that grow out of the bone Add - fontanelles. Fontanelles. Dense connective tissue filled space between skull bones at birth. Fissure. - PowerPoint PPT Presentation

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Page 1: Axial Skeleton

Axial Skeleton

Ch. 7

Page 2: Axial Skeleton

Two types of bone markings

• Depressions – cavities that indent the bone• Projections – processes that grow out of

the bone

• Add - fontanelles

Page 3: Axial Skeleton

Fontanelles

• Dense connective tissue filled space between skull bones at birth

Page 4: Axial Skeleton

Fissure

• Narrow, slit-like opening between adjacent parts of a bone, through which vessels and nerves pass

Page 5: Axial Skeleton

Foramen

• An opening through which blood vessels, nerves, or ligaments pass

Page 6: Axial Skeleton

Fossa

• Depression in or on a bone

Page 7: Axial Skeleton

Groove or sulcus

• Furrow or depression that accommodates a soft structure such as a blood vessel, nerve, or tendon

Page 8: Axial Skeleton

Condyle

• Large, rounded articular prominence

Page 9: Axial Skeleton

Facet

• A smooth, flat surface

Page 10: Axial Skeleton

Head

• Rounded articular projection supported on the neck of a bone

Page 11: Axial Skeleton

Tuberosity

• Large, rounded, usually roughened process

Page 12: Axial Skeleton

Trochanter

• Large projection found only on the femur

Page 13: Axial Skeleton

Skull

• 22 bones• Cranial (8)– Frontal, parietal, temporal, occipital, sphenoid,

ethmoid• Facial (14)– Nasal, maxillae, zygomatic, mandible, lacrimal,

palatine, inferior nasal conchae, vomer

Page 14: Axial Skeleton

Skull

Page 15: Axial Skeleton

Sutures

• Immovable joint found between skull bones• Begin to ossify between age 20-30• Sutures– Coronal – between frontal bone and 2 parietal bones– Sagittal – between two parietal bones– Lambdoid – between parietal bones and occipital

bone– Squamous – between parietal bones and temporal

bones

Page 16: Axial Skeleton

Sutures

Page 17: Axial Skeleton

Vertebral Column

• 26 vertebrae• Numbered by region– C-1, T-5, L-3, etc.

• 5 regions– Cervical (neck) – 7– Thoracic (chest) – 12– Lumbar (lower back) – 5– Sacrum – 5 fused– Coccyx – 4 fused

Page 18: Axial Skeleton

Vertebral Column

• Spinal curvatures – one for each region

Page 19: Axial Skeleton

Vertebrae

• C-1 – atlas; C-2 – axis

Page 20: Axial Skeleton

Rib Cage

• 1-7 are true ribs – attached to sternum• 8-12 are false ribs – no attached to sternum• 11-12 are floating ribs – not attached to

anything• Intercostal space – space between ribs

Page 21: Axial Skeleton

Rib Cage and Sternum

• Clavicle• Xyphoid

process• Sternum