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Published byDonald Shon Hunter Modified over 8 years ago
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The Skeletal System: The Axial Skeleton Handout #4 Skeletal System-KNOW BONES
A. Divisions of the skeletal system B. Skull 1. Sutures 2. Fontanels C. Hyoid bone D. Vertebral column 1. Divisions 2. Normal curves E. Thorax 1. Sternum 2. Ribs
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Adult Human Skeleton 1. axial 2. appendicular
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Human Skull
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Skull Bones 1. cranial (8) 2. facial (14)
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Sutures 1. coronal (1) 2. sagittal (1) 3. lambdoidal (2)
4. squamosal (2) _______________ 5. Wormian bones
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Fontanels 1. anterior (frontal) (1) 2. posterior (occipital (1)
3. anterolateral (sphenoidal) (2) 4. posterolateral (mastoidal) (2) Why are fontanels important? Childbirth and Brain Growth
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Hyoid Bone Why is this bone important?
anchor point for muscles of the: 1. tongue above 2. larynx below
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Vertebral Column 1. series of 26 vertebrae 2. functions
3. intervertebral formina 4. distribution a. 7 cervical b. 12 thoracic c. 5 lumbar d. 1 sacrum e. 1 coccygeal
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Varieties of Vertebrae
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Intervertebral discs 1. location 2. annulus fibrosus
3. nucleus pulposus 4. functions
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Vertebral Curves 1. primary a. thoracic b. sacral 2. secondary
a. cervical b. lumbar
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Thoracic Cage 1. components a. sternum b. costal cartilages
c. vertebral bodies T1 - 12 2. functions Why is this important? protection of viscera, yet flexible enough to allow respirations
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Ribs 1. attachments a. vertebral b. sternal 2. distribution
a. true ribs (1-7) b. false ribs (8-12) c. floating ribs (11-12)
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