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PIMA BIO130

CHP8 Skeletal; Cranial Bones and Their Markings; Ethmoid

QuestionAnswer
Ethmoid Complex irregular bone that helps make up the anterior portion of the cranial floor, medial walls of the orbits, upper parts of the nasal septum, and sidewalls and part of the nasal roof; lies anterior to the sphenoid and posterior to the nasal bones
Cribiform plate Olfactory nerves pass through numerous holes in this horizontal plate
Crista galli Meninges (membranes around the brain) attach to this process
Perpendicular plate Forms the upper part of the nasal septum
Ethmoid sinuses Honeycombed, mucosa-lined air spaces within the lateral masses of the bone
Superior and middle nasal conchae (turbinates) Help form the lateral walls of the nose
Ethmoidal labyrinth Hollow lateral masses of the rthmoid; contain many air spaces (ethmoid cells or sinuses); the inner surface forms the superior and middle conchae
Created by: Jgiron6994