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Terms in this set (108)
Approximately how many bones occur in the adult skeleton?
What are the two main divisions of the skeleton?
Axial skeleton and appendicular skeleton
Which of the two main divisions of the skeletal system consists of the skull, the vertebral column, and the thoracic cage?
What are the two main divisions of the skull?
cranium and face
What cavity within the cranium holds thebrain?
What cavities hold the eyeballs?
What two long, narrow openings that lie within the cavities which hold the eyeballs?
Superior orbital fissure and inferior orbital fissure
Within what cavity of the skull does air pass through to be filtered and have the temperature changed and moisture added?
What structure divides the nasal cavity into right and left halves?
What scroll-shaped bones are visible on the lateral walls of the nasal cavity?
nasal conchae (turbinate bones)
What are fibrous articulations between bones of the skull
What articulation between three of the four bones visible from a superior view of the skull occurs anteriorly in a frontal plane?
What articulation can be seen running along the midline in a superior view of the skull?
What suture lies laterally between the parietal bone and temporal bone on each side?
What articulation can be seen posteriorly in a frontal plane between three of the four bones visible from a superior view of the skull?
What are variable bones that commonly occur in the lambdoidal suture and occasionally in other articulations within the skull?
What is a synonym for "skullcap"?
calvaria (plural = calvariae)
What bone forms part of the calvaria, the forehead, and the roof of the orbits?
What is a synonym for the brow ridges?
What cavity lies within the frontal bone?
What bones of the skull form the lateral walls and roof of the cranium?
What bones of the skull form the inferior, lateral walls and part of the floor of the cranium?
What part of the temporal bone holds the middle and inner ear?
What opening occurs on the medial, posterior aspect of the temporal bone for blood vessels and nerves?
internal acoustic meatus
What is the posterior region of the temporalbone?
What prominence on the temporal bone lies posterior to the ear, serves as the insertion for the sternocleidomastoid, and contains air cells?
What region of the temporal bone surrounds the bony, external opening of the ear?
What thin point of bone on the temporal bone serves as an attachment for several hyoid and tongue muscles?
What opening does the facial nerve pass through on the inferior surface of the skull?
What opening does the internal carotid arterypass through here?
What region of the temporal bone forms the superior, lateral, flat area of the bone?
What bony process projects anteriorly from the squamous region of the temporal bone
What part of squamous region of the temporal bone articulates with the mandible
What is the opening for the ear?
External auditory canal (external acoustic meatus)
What bone forms the posterior portion of theskull and the base of thecranium?
What is the flat, posterior region of the occipital bone?
what region of the occipital bone forms the base of the cranium?
What is the large, circular opening within the skull for the spinal cord to pass through?
What are the smooth, rounded projections on the left and right sides of the foramen magnum?
Within the skull what is the opening for cranialnerve XII?
What bony prominence can be easily palpated on the midline of the occipital bone?
external occipital protuberance
What superior, horizontal line projects laterally from the external occipital protuberance?
superior nuchal line
What bone of the skull has a butterfly-shape and unites the cranial and facial bones?
What is the thick, medial part of the sphenoid?
What cavities lie within the sphenoid?
what projections of the sphenoid lie superior to the superior orbital fissure?
What projections of the sphenoid lie inferior to the superior orbital fissure and can be seen in a lateral view of the skull?
Within the sphenoid what is the depression holding the pituitary gland?
What is the bony enclosure of the hypophyseal fossa?
Through what opening of the sphenoid does theoptic nerve pass?
optic foramen (canal)
What three foramina penetrate the greater wings of the sphenoid?
foramen rotundum, foramen ovale, foramen spinosum
What projections of the sphenoid provide attachment surfaces for some muscles that move the lower jaw and soft palate
medial and lateral pterygoid plate
What bone of the skull lies between the orbits and forms the anteromedial floor of the cranium?
What is the superior, midsagittal elevation of the ethmoid?
What horizontal structure of the ethmoidseparates the cranialand nasal cavities?
Through what openings do the olfactory nerves pass?
What are the cavities within the ethmoid?
What parts of the ethmoid bone hold the cavities within it?
What part of the ethmoid forms the medial wall of the orbits?
What scroll-like extensions of the ethmoid project medially into the nasal cavity?
superior and middle nasal conchae
List the three cranial fossae.
anterior cranial fossa
middle cranial fossa
posterior cranial fossa
What is the anatomical term for the cheekbone?
zygomatic bone (zygoma)
What bony projections of the zygomatic bones contribute to the zygomatic arches?
In addition to the temporal process, what other two processes articulate the zygomatic bone with surrounding bones?
maxillary process and frontal process
Where bone forms the anterior, medial orbital wall?
What depression in the lacrimal bone holds the lacrimal sac?
Within the lacrimal bone what structure allows the passage of the nasolacrimal duct?
What bones of the face form the bridge of the nose?
What facial bone articulates with the perpendicular plate of the ethmoid to form the nasal septum?
What is the scroll-shaped bone of the inferior, lateral wall of the nasal cavity?
inferior nasal concha
List the three nasal conchae found on each side of the nasal cavity.
superior, middle, inferior
What is a synonym for the nasal conchae?
What L-shaped bones of the face form the posterior third of the hard palate, the posterior, lateral portion of the nasal cavity, and a portion of the orbit?
What portion of the palatines forms the posterior third of the hard palette?
What part of the palatine forms theposterior, lateral wall ofthe nasal cavity?
What part of the palatine forms a small part of the floor of the orbit?
What bone holds the upper teeth and forms the anterior two thirds of the hard palate and the floor of the orbit?
What part of the maxilla forms the floor of the orbit?
What opening within the maxilla do the infraorbital artery and nerve pass through?
What part of the maxilla holds the upperteeth?
What part of the maxilla forms the anterior two thirds of the hard palette?
What large cavity lies within the maxilla?
what is the only bone of the lower jaw?
What is the horizontal portion of the mandible?
What are the ascending, posterior regions of themandible?
rami (singular = ramus)
What part of the mandible holds the lower teeth?
What are the two corners of the mandible?
angle of the mandible
What opening lies on the anterolateral surface of the body of the mandible?
What opening within the mandible lies on the posterior, medial side?
What process of the mandible articulates with the temporal bone?
condylar (condyloid) process
What is the smooth, round portion of this process?
What is the joint between the mandible and the temporal bone?
What process of the mandible does the temporalis insert on?
What bones make up the roof of the nasal cavity?
Ethmoid - cribriform plate. Frontal bone. Sphenoid bone
What bones make up the floor of the nasal cavity?
Maxilla - palatine process. Palatine - horizontal plate.
What bones form the lateral walls of the nasal cavity?
Ethmoid bones. Maxillae. Inferior nasal conchae. Palatine bones. Lacrimal bones.
List the groups of paranasal sinuses.
List the bones that form the orbit.
Frontal bone. Zygomatic bone. Maxilla. Lacrimal bone. Ethmoid. Palatine. Sphenoid.
What is the collective term for the tiny bones of the middle ear?
List the ear ossicles from lateral to medial.
malleus, incus, stapes
What small, U-shaped bone lies superior to the larynx?
What is the anatomical term for the softspots in a baby's skull?
What is the function of the fontanelles?
List the four fontanels.
Sphenoid (anterolateral) fontanel
Mastoid (posterolateral) fontanel
What fontanel is found on the anterior portion of the midline on the superior aspect of the skull?
What fontanel is found on the posterior portion of the midline on the superior aspect of the skull?
What fontanel is found on the anterior, lateral aspect of the skull?
sphenoid (anterolateral) fontanel
What fontanel is found on the posterior, lateral aspect of the skull?
mastoid (posterolateral) fontanel
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