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The Skeleton Pt1
The skull (cranial and facial)
Question | Answer |
---|---|
What does skeleton mean? | Dried up body or mummy |
What is the skeleton composed of? | Bones, cartilage, ligaments, and joints |
How much of your body’s mass is skeleton? | 20 percent |
How many bones make up the axial skeleton? | 80 |
What are the 3 major regions of the axial skeleton? | Skull, vertebral column, bony thorax |
What does the axial skeleton support? | The head, neck, and trunk |
What does the axial skeleton protect? | The brain, spinal cord, and organs of the thorax |
How many cranial and facial bones are there? | 22 |
What does the cranium do? | Enclose and protect the brain |
What is the place of attachment for head and neck muscles? | The skull |
What are the functions of the facial bones? | 1) forms face 2) contains sense organs (sight, smell, taste) 3) contains openings for air and food passage 4) secures teeth 5) anchors facial muscles for expressions |
What are sutures? | Interlocking joints for flat bones of the skull |
What are the 4 major sutures? | Coronal, sagittal, squamous, and lambdoid |
What does the coronal suture do? | Fuses parietal and frontal bones (anterior) |
What does the sagittal suture do? | Fuses parietal bones (medial) |
What does the squamous suture do? | Fuses parietal to temporal (lateral) |
What does the lambdoid suture do? | Fuses parietal to occipital (posterior) |
What is the cranial cavity? | The opening for the brain |
What does the cranial cavity have? | A vault (calvaria) and a base (floor) |
Why does the brain rest on the cranial fossae (steps)? | To hold it in place securely |
Why are there inner cavities? | For hearing, sight, and sinuses to lighten skull |
How many cranial bones are there? | 8 |
What are the cranial bones? | The paired parietal and temporal bones, and the frontal, occipital, sphenoid and ethmoid bones |
What is the carotid canal? | Temporal bone- opening for carotid artery |
What is the sella turcica? | Sphenoid- supports pituitary gland |
What is the jugular foramen? | Temporal bone- opening for Jugular vein |
What is the cribiform plate? | Ethmoid- olfactory nerves |
What are the occipital condyles? | Articulate with the first vertebra |