A. Divisions of the skeletal system B. Skull 1. Sutures 2. Fontanels

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Presentation transcript:

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

Adult Human Skeleton 1. axial 2. appendicular

Human Skull

Skull Bones 1. cranial (8) 2. facial (14)

Sutures 1. coronal (1) 2. sagittal (1) 3. lambdoidal (2) 4. squamosal (2) _______________ 5. Wormian bones

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

Hyoid Bone Why is this bone important? anchor point for muscles of the: 1. tongue above 2. larynx below

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

Varieties of Vertebrae

Intervertebral discs 1. location 2. annulus fibrosus 3. nucleus pulposus 4. functions

Vertebral Curves 1. primary a. thoracic b. sacral 2. secondary a. cervical b. lumbar

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

Ribs 1. attachments a. vertebral b. sternal 2. distribution a. true ribs (1-7) b. false ribs (8-12) c. floating ribs (11-12)