Structurally the ethmoid forms part of the cranial floor the medial wall of the orbits eye sockets part of the nasal septum and part of the sidewalls of the nasal cavity.
Cranial floor unlabeled.
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Since the brain occupies these areas the shape of each conforms to the shape of the brain regions that it contains.
The floor of the cranial cavity increases in depth from front to back and is divided into three cranial fossae.
The floor of the middle cranial fossa and part of the posterior cranial fossa is formed by the temporal bone.
The various portions contribute to the floor of the middle cranial fossa and a part of the posterior cranial fossa and has an important relationship.
Or temporal squama pars squamosa.
Using the interactive image identify each of the following parts of the ethmoid which are too small to observe in your dissection.
Inside the skull the floor of the cranial cavity is subdivided into three cranial fossae spaces which increase in depth from anterior to posterior see figure 4 figure 6b and figure 9.
The sphenoid bone is a butterfly shaped cranial bone that is located in the middle of the skull between the frontal and temporal bones.
This bone articulates with the sphenoid anteriorly and the occipital bone posteriorly.