BIOL 14108 Chapter Notes - Chapter 7: Ear Canal, Lambdoid Suture, Foramen Magnum
17 Jan 2016
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Document Summary
Two parts: axial skeleton: skull, hyoid, vertebral column, thoracic, appendicular skeleton: pectoral girdle, upper limbs, pelvic girdle, lower limbs. Some cranial bones contain air sacs called par nasal sinuses. Sinuses reduce skull"s weight and increase intensity. Eight bones: frontal bone: marked by supra orbital foramen. Has 2 frontal sinuses: parietal bone: sides of skull. Fused along sagittal suture and meets front at coronal suture: occipital bone: base of skull. Large opening lower surface, is called foramen magnum. Occipital condyles, located on each side of foramen magnum articulate with atlas: temporal bones: each side of skull. Mandibular fossae depressions that articulates with condyle of mandible. Below external acoustic meatus, there are two projections; mastoid and styloid. Mastoid is an attachment for certain muscles in neck. Styloid anchors muscles and pharynx and tongue: sphenoid bone: wedged between other bones in anterior. Sella turcia portion of sphenoid bone: ethmoid bone: front of sphenoid bone.
