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Cards In This Set
| Front | Back |
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What makes up the axial skeleton?
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Skull, vertebral column, thoracic cage
(forms the longitudinal axis of the body) |
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2 sets of bones in the skull:
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Cranium
Facial bones |
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What are sutures?
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Sutures are interlocking, immovable joints that connect different bones of the skull.
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What bone is the only one that is attached to the skull by a freely moving joint (not by a suture)?
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The mandible (jawbone)
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List the bones of the cranium
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Frontal bone
Parietal bones Temporal bones Occipital bone Sphenoid bone Ethmoid bone |
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Describe the frontal bone of the cranium
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Forms the forehead and superior part of each eye's orbit
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Describe the parietal bones of the cranium
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Sit on either side of the skull to form the lateral walls of the cranium; meet at the midline of the skull and are connected by the sagittal suture. Meet the frontal bone at the coronal suture.
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What suture connects the two parietal bones?
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The sagittal suture
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What suture connects the parietal bones to the frontal bone?
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The coronal suture
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What suture connects the temporal bones to the parietal bones?
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The squamos sutures
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7 bone markings on the temporal bone (describe)
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1. External Acoustic Meatus: canal that leads to the ear drum/middle ear.
2. Styloid Process: Needlelike projection that attaches to neck muscles. 3. Zygomatic Process: Joins with cheekbone (zygomatic bone) anteriorly. 4. Mastoid Process: full of air cavities (sinuses), attachment sight for neck muscles. 5. Jugular Foramen: where the occipital and temporal bones meet; allows passage of jugular vein. 6. Internal Acoustic Meatus: transmits cranial nerves 7. Carotid Canal: carotid artery runs through it, supplies blood to brain |
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Describe the occipital bone in the cranium
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Most posterior bone of the cranium
Foramen magnum (large opening) to allow spinal cord to connect to brain. |
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What suture connects the occipital bone to the parietal bones?
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The lambdoid suture
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Describe the occipital condyles
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Structures which rest on the first vertebra of the spinal column, allows the head to move left and right.
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Describe the sphenoid bone
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Butterfly-shaped, spans the width of skull, forms part of the floor of the cranial cavity.
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