Using the interactive image identify each of the following parts of the ethmoid which are too small to observe in your dissection.
Cranial floor unlabeled.
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A small area of the ethmoid bone consisting of the crista galli and cribriform plates is located at the midline of this fossa.
The anterior cranial fossa is located between the frontal bone and lesser wing of the sphenoid bone.
Or temporal squama pars squamosa.
The floor of the cranial cavity increases in depth from front to back and is divided into three cranial fossae.
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.
This bone articulates with the sphenoid anteriorly and the occipital bone posteriorly.
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.
The sphenoid bone is a butterfly shaped cranial bone that is located in the middle of the skull between the frontal and temporal bones.
Since the brain occupies these areas the shape of each conforms to the shape of the brain regions that it contains.