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Exercise 7. Axial Skeleton. Portland Community College BI 231. Bone Landmarks. All bones possess distinctive landmarks that are designed for specific functions. Review table 7.1. Axial Skeleton. Skull Spine Thoracic Cage Hyoid bone. Supraorbital ridge. Frontal Bone. Frontal Bone.
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Exercise 7 Axial Skeleton Portland Community College BI 231
Bone Landmarks • All bones possess distinctive landmarks that are designed for specific functions. • Review table 7.1
Axial Skeleton • Skull • Spine • Thoracic Cage • Hyoid bone
Supraorbital ridge Frontal Bone Frontal Bone Frontal Bone
Frontal Bone Frontal Sinus
Parietal Bone Parietal Bone
Parietal Bone Parietal Bone
Temporal Bone Temporal Bone
Temporal Bone External Acoustic Meatus Zygomatic Arch Mastoid Process Mandibular fossa Styloid Process
Temporal Bone Carotid Canal Jugular Foramen
Temporal Bone Temporal Bone Temporal Bone
Occipital Bone Occipital Condyles Foramen Magnum External occipital protuberance
Coronal Suture Parietal Bone Frontal Bone Between the Parietal bones and the Frontal Bone Temporal Bone Occipital Bone
Squamous Suture Parietal Bone Frontal Bone Between the Parietal bone and the Temporal Bone Temporal Bone Occipital Bone
Sagittal Suture Occipital Bone Between the Right and Left Parietal bones Parietal Bone (Right) Parietal Bone (Left) Frontal Bone
Lambdoid Suture Parietal Bone Frontal Bone Between the Parietal bones and the Occipital Bone Temporal Bone Occipital Bone
CraniumFloor Anterior Cranial Fossa Middle Cranial Fossa PosteriorCranial Fossa
Sphenoid Bone Foramen lacerum Lesser Wing Greater Wing Sella Turcica Foramen rotundum Foramen ovale Foramen spinosum
SphenoidBone Hypophyseal Fossa Dorsum Sella Petrous ridge Internal acoustic canal
Sphenoid Bone Sphenoidal Sinus Pterygoid Process
Sphenoid Bone Lesser Wing Greater Wing Pterygoid Process Lateral Pterygoid Plate Medial Pterygoid Plate
Ethmoid Bone Crista Galli Perpendicular Plate
Ethmoid Bone Middle NasalConchae Perpendicular Plate
Ethmoid Bone Cristae Galli Cribriform Plate Perpendicular Plate
Facial Bones Middle NasalConchae (Ethmoid) Inferior Nasal Conchae Perpendicular Plate (Ethmoid) Vomer
Zygomatic Bone Temporal Process Zygomatic Arch
Maxilla Hard Palate Infraorbital foramen Alveolar processes
Palatine Bone Vomer
Mandible Coronoid Process Mandibular Condyle Alveolar Process Ramus Angle Mental Foramen Body
Mandible Mandibular Foramen Mylohyoid Line
Openings • Foramen rotundum • Foramen lacerum • Foramen ovale • Jugular foramen • Internal acoustic canal • Hypoglossal canal
Sinuses Ethmoid Air Cells Frontal Sphenoidal Maxillary
Wormian (Sutural) Bones Small islands of bone that fill gaps in sutures. Present in varying amounts
Cervical Spine • 7 Vertebra • C1-C7 • Concave Posterior
Thoracic Spine • 12 Vertebra • T1-T12 • Convex Posterior • Attach to the ribs
Lumbar Spine • 5 Vertebra • L1-L5 • Concave Posterior
Sacral Spine • 5 Fused Vertebra • “Sacrum”
Coccyx • 4 Fused Vertebra
Sacrum 5 Fused Vertebrae
Sacrum Sacral Foramina
Sacrum Sacral Promontory