Week 7: OAP Lab 2 Flashcards
How many cranial bones and facial skeleton bones are there?
8 cranial bones and 14 facial skeleton bones
Also 6 ear bones
What are the bones of the skull joined by? (Except the mandible)
Sutures, which are a kind of joint that is synarthrodial so it cant move
What are the eight cranial bones?
One occipital bone One sphenoid bone One ethmoid bone One frontal bone A pair of parietal bones A pair of temporal bones
Where is the occipital bones found?
At the back of the skull
Where is the sphenoid bone found?
Middle inferior portion of the neurocranium and kind of looks like a butterfly.
In front of the temporal bone and is one of 7 bones that articulate to form the orbit (hole where eyeball sits)
What are the 7 bones that articulate to form the orbit?
Sphenoid bone, frontal bone, lacrimal bone, the ethmoid bone, zygomatic bone, the maxillary bone and the palatine bone.
Where is the ethmoid bone found?
Between your eyes, located at the roof of the nose and separates the nasal cavity from the brain
Where is the frontal bone?
The bone of your forehead, has two portions- one vertical and also the horizontally-oriented orbital portion
Where are the parietal bones joined? What do they form?
Joined together at the top of the skull.
Form the top and sides of the Neurocranium.
Each bone is roughly quadrilateral in shape.
Where are the temporal bones found?
Can be found at the sides and base of the skull. Overlaid by temples.
Where are the ossicles? (The bones of the middle ear and smallest bones in the body) And how many ossicles are there on each side of the head?
Inside the petrous part of the temporal bone.
3 on each side of the head (6 total) called the hammer, anvil and stirrup also called the malleus, incus and stapes.
What joins the middle and outer ear?
The ear canal, also known as the external acoustic meatus.
There is also the internal acoustic meatus, which is a tube running from the inner ear to the back of the skull- to what’s called posterior cranial fossa.
What are the facial bones? (14)
The mandible The vomer A pair of maxillae A pair of palatine bones A pair of nasal bones A pair of nasal conchae A pair of zygomatic bones A pair of lacrimal bones
What is the mandible?
The mandible is the jawbone.
Largest bone in the human face and is the only movable bone in the skull a part of from the ossicles.
What does the vomer form and articulate with?
Forms the inferior part of the nasal septum.
Articulates with the sphenoid, ethmoid, palatine bones and maxillary bones.
Where are the maxillae fused together?
Fused @ the Inter-maxillary suture to form the bone of the upper jaw.
This includes the hard palate. They are located @ the back of the nasal cavity.
Where are the pair of nasal bones joined and what do they form?
Joined @ the inter-nasal suture.
Pair of nasal bones form the bridge of nose.
What do the nasal conchae form? What are the three pairs?
The nasal conchae are thin bony elements forming the upper chambers of the nasal cavities. They are composed of three pairs – the inferior, middle, and superior conchae.
What do the zygomatic bones articulate with?
They are the cheekbones.
Articulate with the maxilla, temporal bone, sphenoid bone, and the frontal bone.
Where is the lacrimal bone?
Small bone in the front of the medial wall of the orbit.
What are the immovable joints that fuse most of the skull bones together called?
Sutures
