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Anatomy Chapter 2 Lab Part A
Terms in this set (69)
Anterior Cranial Fossa
formed by the frontal bone and part of the sphenoid bone
Middle Cranial Fossa
formed by part of the sphenoid bone and the temporal bone
Posterior Cranial Fossa
formed by the occipital bone
separates the frontal bone from the two parietal bones
Separates the two parietal bones from each other
Separates the occipital bone from the two parietal bones
Separates each temporal bone from the adjacent parietal bone
Forms the posterior and inferior portion of the skull
Large opening in the inferior portion of the occipital bone through which the brainstem passes.
Smooth bumps located laterally to the foramen magnum. The concave facets of the atlas articulates with these.
are small oval openings formed along the suture between the occipital bone and the temporal bone.
Internal Jugular Vein, Cranial Nerves 9,10,11
These pass through the jugular foramen
small opening that passes through the occipital bone just above the occipital condyle.
Cranial Nerve 12
This passes through the hypoglossal canal
The thick region of the occipital bone anterior to the foramen magnum where the occipital bone articulates with the sphenoid bone.
Forms part of the floor and lateral walls of the cranium
Greater Wings of the Sphenoid Bone
Extend laterally and articulate with the frontal bone and the parietal bone on each side of the skull. Also form a portion of the posterior portion of the eye orbits
Lesser Wings of the Sphenoid Bone
Located medial to the greater wings, the optic canals pass through this part of the bone. Also form superior portion of the super orbital fissure.
Pass through the lesser wings of the sphenoid bone, openings in which the optic nerves pass.
The place where two wooden probes would cross if ran through the optic canals.
Superior Orbital FIssure
Diagonal Slits located lateral to the optic canals. The lesser and greater wings of the sphenoid bone form the border. It is a passage way for blood vessels and cranial nerves 8,9,10.
Blood Vessels, Cranial Nerve 3,4,6
Pass through the superior orbital fissure.
Body of the Sphenoid Bone
Is the central portion of the sphenoid located medial and inferior to the greater wings. Also contains the Sphenoid Sinuses.
Deep depression in the superior portion of the body of the sphenoid and it houses the pituitary gland.
Is the small opening located within the medial region of the greater wing. It serves as an opening for the passage of Cranial Nerve 5.
Slightly larger than and more laterally and posteriorly located than the foramen rotundum. Cranial Nerve 5 passes through it.
Small opening that is lateral and posteriorly located than the foramen oval. Cranial Nerve passes through this hole.
Foramen Rotundum, Foramen Ovale, Foramen Spinosum
Cranial Nerve 5 passes through these holes.
located at the midline and forms a portion of the anterior floor of the cranium and the roof of the nasal cavity.
is the pointed structure on the superior surface of the ethmoid bone. A portion of the dura mater attaches to the crista galli.
Is the region of porous bone to either side of the crista galli. Cranial Nerve 1 passes through the cribriform foramen of the ethmoid bone.
the vertical portion of the ethmoid located at the midline of the bone. This forms the superior part of the bony nasal septum.
Project from the inferior surface of the sphenoid bone.
Superior and Middle Nasal Conchae
Bony scroll-shaped structures extending into the nasal cavity.
Forms part of the lateral walls and part of the floor of the cranium
Mastoid process of the temporal bone
Large blunt process located posterior and inferior to the external ear. It is also the attachment for the sternocleidomastiod muscle.
Styloid Process of the temporal bone
Pointed structure located anterior to the mastoid process. Tendon and ligaments connect this structure with the hyoid bone
Petrous Part of the temporal bone
Bony ridge that forms part of the floor of the cranium. It contains the auditory ossicles as well as the structures of the inner ear
Malles, Incus, Stapes
External Acoustic Meatus
Opening for the ear canal, it is anterior and superior to the mastoid process
The passageway for the internal carotid artery, this opens just anterior to the jugular foramen
Zygomatic Process of the Temporal Bone
Meets the Temporal Process of the Zygomatic Bone to form the Zygomatic Arch
is a depression on the proximal, inferior surface of the zygomatic process of the temporal bone. It articulates with the condylar process of the mandible.
Internal Acoustic Meatus
Located on the medial surface of the petrous part of the temporal bone, passageway for cranial nerves 7,8
Cranial Nerves 7,8
Internal Acoustic Meatus is the passageway for
Articulates with the perpendicular plate of the ethmoid bone to form the the posterior inferior portion of the bony nasal septum.
Lower jaw, only movable bone in the skull.
Is a round knob that articulates with the mandibular fossa of the temporal bone. Forms the temporomandibular joint (TMJ)
Anterior to the condylar process . HEre is the attachment of the temporalis muscle.
area of the mandible that houses the tooth sockets for the lower dentition.
The curved part of the lower jaw.
Small openings on the anterior surface of the mandible for the passage of blood vessels and nerves.
Only non articulating bone in the human body. It is attached via tendons and ligaments to the styloid process, the inferior border of the mandible, and the sternum.
Form the upper jaw. The two maxillae articulate with each other along the midline between the two front incisors. Also forms fart of the orbit of the eye and the hard palate.
Frontal Process of the Maxilla
Pointed structure that articulates with the frontal bone, forms part of the bridge of the nose.
Is the area of the maxilla that houses the tooth sockets for upper detention.
Palatine Process of the Maxilla
anterior portion of the hard palate, which articulates with the horizontal plate of the palatine bone.
Horizontal Plate of the Palatine bone
Articulates with the palatine process of the maxilla, and is posterior portions of the hard palate.
Forms part of the bridge of the nose. The nasal bones articulate with the bone of the frontal bone and the maxilla.
form a portion of the orbit and contain the opening for the nasolacrimal duct.
Inferior Nasal Conchae
Connected to the walls of the maxilla and are visible through the nasal cavity.
Orbit of the Eye/ Orbital Fossa
Is formed by 7 different bones in the face.
Sphenoid Bone, Lacrimal Bone, Ethmoid Bone, Palatine Bone, Zygomatic Bone, Frontal Bone, Maxilla.
7 different bones that make up the orbit of the eye or orbital fossa
Divides the nose into right and left passageways.
Perpendicular Plate of the ethmoid bone, vomer
Different bones that make up the nasal septum
These are found in the Sphenoid, the Ethmoid, frontal and maxillary bones.
Frontal, Ethmoid, Sphenoid, and Maxillary
4 Bones in the face that contain sinuses
soft spots begin as membranous portions of the infant skull at the places where the parietal bones fuse with their adjoining bones.
Frontal, Occipital, 2 Sphenoid, 2 Mastoid
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