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Megan Kielsmeier
weeks 6-12 -
Term | Definition |
---|---|
axial skeleton | made up of eight bones |
appendicular skeleton | made up of 126 bones |
cranium | brain case |
Superior temporal line | Superior of two very faint curving lines across parietal and frontal bones |
Inferior temporal line | Inferior of two very faint curving lines across parietal and frontal bones; sometimes more pronounced than superior line |
Squamous portion | Thin, flaring upper part of the bone |
Mastoid portion | Rough-surfaced lower part of the bone posterior to the external acoustic meatus |
Petrous portion | Wedge-shaped process that forms part of the center section of the cranial floor between the sphenoid and occipital bones |
Mastoid process | Protuberance just behind the ear |
External acoustic meatus (or canal) | Tube extending into the temporal bone from the external ear opening to the tympanic membrane |