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Unformatted text preview: 9/11/11 1 Axial Skeleton Chapter 7 IB 131 Lecturer: Tom Carlson Department of Integrative Biology University of California, Berkeley 1 The Skeleton Consists of: bones cartilage joints ligaments Composed of 206 named bones grouped into two divisions Axial skeleton (80 bones) Appendicular skeleton (126 bones) 2 The Axial Skeleton (in green) Formed from 80 named bones Consists of skull, vertebral column, and bony thorax Figure 7.1a Skull Thoracic cage (ribs and sternum) (a) Anterior view Facial bones Cranium Sacrum Vertebral column Clavicle Scapula Sternum Rib Humerus Vertebra Radius Ulna Carpals Phalanges Metacarpals Femur Patella Tibia Fibula Tarsals Metatarsals Phalanges 3 The Axial Skeleton (in green) Figure 7.1b (b) Posterior view Cranium Clavicle Bones of pectoral girdle Bones of pelvic girdle Upper limb Scapula Rib Humerus Vertebra Radius Ulna Carpals Phalanges Metacarpals Femur Lower limb Tibia Fibula 4 Figure 7.6a The Skull Formed by cranial and facial bones Parietal bone Squamous part of frontal bone Nasal bone Sphenoid bone (greater wing) Temporal bone Ethmoid bone Lacrimal bone Zygomatic bone Maxilla Mandible Infraorbital foramen Mental foramen (a) Anterior view of skull Mental protuberance Frontal bone Glabel a Frontonasal suture Supraorbital foramen (notch) Supraorbital margin Superior orbital fissure Inferior orbital fissure Middle nasal concha Inferior nasal concha Vomer Optic canal Perpendicular plate Ethmoid bone 5 The Cranium Bones of cranium (cranial vault) Lambdoid suture Facial bones Squamous suture (a) Cranial and facial divisions of the skull Coronal suture Figure 7.2a 6 9/11/11 2 The Cranium Is the bodys most complex bony structure Formed by cranial and facial bones The cranium Encloses and protects brain Provides attachment for head and neck muscles 7 The Facial Bones Form framework of the face Form cavities for the sense organs of sight, taste, and smell Provide openings for the passage of air and food Hold the teeth in place Anchor muscles of the face 8 Anterior cranial fossa Middle cranial fossa Posterior cranial fossa (b) Superior view of the cranial fossae Frontal lobe of cerebrum Temporal lobe of cerebrum Cerebel um Posterior Middle Anterior Cranial fossae (c) Lateral view of cranial fossae showing the contained brain regions Overview of Skull Geography Facial bones form anterior aspect Cranium is divided into cranial vault and the base Internally, prominent bony ridges divide skull into distinct fossae Figure 7.2b, c 9 Anterior cranial fossa Middle cranial fossa Posterior cranial fossa (b) Superior view of the cranial fossae Frontal lobe of cerebrum Temporal lobe of cerebrum Cerebel um Posterior Middle Anterior Cranial fossae (c) Lateral view of cranial fossae showing the contained brain regions Cranial Fossae Anterior cranial fossa Middle cranial fossa Posterior cranial fossa Figure 7.2b, c 10 Small Cavities of Skull...
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This note was uploaded on 10/14/2011 for the course IB 131 taught by Professor Carlotom during the Spring '11 term at City College of San Francisco.
- Spring '11