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Bio 233 S.G. 5

Axial Skeleton

QuestionAnswer
Axial Skeleton The bones that lie around the body's center of gravity
Skull Composed of two sets of bones: the cranium and facial bones.
Cranium Enclose and protect the fragile brain tissue.
Cranial Vault Inside the top of the skull. Forms the superior, lateral, and posterior walls of the skull.
Anterior, Middle, and Posterior Cranial Fossae Makes up the cranial floor, the brain sits in these fossae.
Frontal Bones Anterior portion of cranium; forms forehead, superior part of the orbit, and floor of the anterior cranial fossa.
Supreorbital Foramen (notch) Tiny notches in eye socket (Opening above each orbit)
Parietal Bone Posterolateral to frontal bone.
Sagittal Suture Down the middle (Midline articulation point of the two parietal bones).
Coronal Suture Behind frontal bone connecting to parietal (Point of articulation with frontal bone).
Temporal Bone Inferior to parietal bone on lateral skull.
Squamous Suture Between Parietal and Temporal bones (point of articulation of temporal bone with the parietal bone).
Zygomatic Process of the Temporal Bone Portion of process between "cheek" and "ear" located on the Temporal bone going toward the Zygomatic bone.
Mandibular Fossa Underside next to the Temporal bone (rounded depression on the inferior surface face of the zygomatic process, anterior to ear).
External Acoustic Meatus "Ear canal" on the outside, above (anterior) the styloid.
Styloid Process of the Temporal Bone Under the "ear canal" (Needlelike projection inferior to external acoustic meatus).
Mastoid Process Large, behind styloid (Projection inferior and posterior to external acoustic meatus).
Styloidmastoid Foramen Between styloid and mastoid processes (Tiny opening between the mastoid and styloid processes).
Jugular Foramen Next to styloid process (opening medial to the styloid process).
Cartoid Canal Above jugular foramen (opening medial to the styloid process).
Internal Acoustic Meatus Inside the lower portion of skull, above jugular foramen (Opening on posterior aspect of temporal bone).
Foramen Lacerum Jagged opening between the posterior aspect of temporal bone and the sphenoid.
Occipital Bone Back of the skull (Most posterior bone of cranium).
Lambdoid Suture Above Occipital bone (site of articulation of occipital bone and parietal bones).
Foramen Magnum Big hole underside of lowe skull (large opening in base of occipital).
Occipital Condyles Raised bone on sides of foramen magnum (Rounded projections lateral to the foramen magnum).
Hypoglassal Canal Inside lower portion of skull, tiny hopes on either side of foramen magnum (opening medial and superior to the occipital condyle).
External Occipital Protuberance Base of occipital bone in the back (Midline prominences posterior to the foramen magnum).
Sphenoid Bone Behind zygomatic bone (Bat-shaped bone).
Superior Orbital Fissure Top of eye socket (Jagged openings in orbits).
Sella Turcica Ridges above magnum (A saddle-shaped region in the sphenoid midline).
Hypophyseal Fossa Center between ridges (part of the hypophyseal fossa).
Optic Canals Next to superior orbital fissue (openings in the bases of the lesser wings).
Foramen Rotundum Next to top ridge on sella turcica (opening lateral to the sella turcica).
Foramen Ovale Large hole below foramen rotundum (opening posterior to the sella tucica).
Foramen Spinosum Below foramen ovale.
Ethmoid Bone Behind Lacrimal bone (Irregular shaped bone anterior to sphenoid).
Crista Galli Above sella turcica ("cock's comb" vertical projection).
Cribriform Plate Surrounds crista galli (Bony plates lateral to the crista galli).
Perpendicular Plate Between the nasal conchae (inferior projection of the ethmoid).
Nasal Conchae (general) Either side of perpendicular plate (Thin, delicately coiled plates of bone extending medially from the lateral masses of the ethmoid into the nasal cavity).
Facial Bones Composed of 14 bones, 12 are paired. Only the mandible and vomer are single bones.
Mandible "Jaw" (The lower jawbone).
Body of Mandible (Mandible Body) Lower portion of bone (horizontal portion).
Ramus of the Mandible (Mandible Ramus) "arm" of mandible (vertical extention of the body on either side).
Mandibular Condyle Top of the "arm" (Articulation point of the mandible).
Coronoid Process of the Mandible Across from condyle (Jutting anterior portion of the ramus).
Created by: AmericanDame105
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