Topic 3B Flashcards
How many bones does the human skeleton have?
206
What is the axial skeleton?
Bones of skull, vertebral column, rib cage
What is the appendicular skeleton?
Bones of upper and lower limbs and pelvic girdles
What 2 sets of bones does the skull have?
Cranial and facial
The cranium is divided into a cranial vault and a cranial base. What are the three areas of the cranial base?
Anterior (highest) fossa, middle fossa, and posterior (lowest) fossa
What are the 8 bones of the cranium?
(Mnemonic: PEST OF):
Parietal
Ethmoid
Sphenoid
Temporal
Occipital
Frontal
What are the names of the four sutures for the parietal bones?
Metopic / squamous
Coronal
Sagittal
Lambdoid
What is the foreman magnum, part of the occipital bone?
It is a large hole at the base of the occipital bone that is a passage to connect the brain and spinal cord.
What are the three different areas of the temporal bones?
Squamous, tympanic, and petrous
What is the mastoid process in the temporal bones?
It is a major attachment area for some neck muscles
What is the styloid process in the temporal boones?
It is the attachment area for muscles of the tongue and some neck muscles. (It’s important for swallowing and speech.)
Why is the sphenoid bone known as the keystone bone?
Because it articulates with numerous other cranial bones and brings them together like a keystone in an arch.
What are sphenoid sinuses? (What is it’s purpose?)
They are air like cavities that make the skull lighter.
What are the four major cranial sutures?
Squamous
Coronal
Sagittal
Lambdoid
What are the unpaired facial bones?
Mandible and vomer
What is the name of the lower jaw bone? It is the strongest and largest bone of the face.
Mandible
What is the keystone facial bone? It is the keystone facial bone.
Maxillary bones
What are orbits in the skull?
It holds the eyes and its accessories.
What is the name of the bone in the body does not articulate with any other bone? It supports the tongue and gives attachment to muscles for swallowing and speech.
The hyoid bone.
What are the four types of paranasal sinuses?
Frontal
Maxillary
Sphenoid
Ethmoid
What is the role of paranasal sinuses?
Lightens the skull
Enhances resonance of voice
Connects nasal cavity so also helps to warm and humidify incoming air since it is lined with mucus.
