Axial Skeleton Flashcards
what does the skull do?
protects and houses the brain
what is the mouth a passageway for?
digestive and respritory systems
how many bones make up the axial skeleton?
22 bones
what are the two subcategories the skull is divided into and how many are in each?
cranial- 8 bones
facial- 14 bones
forms on the forehead
frontal bone
form the majority of the top and sides of the skull
parietal bone (2)
surround the ear
temporal bone (2)
forms the base and lower back portion of the skull
occipital bone
forms the nasal septum
ethmoid
butterfly shaped and centrally located, supports part of the base of the brain, forms part of the orbits or the eye, and connects the other bones of the skull.
sphenoid
form the upper jaw, house of the upper teeth, and connect all other facial bones EXCEPT the mandible
maxillary bones (2)
form the posterior part of the hard palate, or roof of the mouth
palatine bones (2)
cheekbones, form much of the sides of the orbits or eye sockets
zygomatic bones (2)`
tiny bones connecting the orbits and surrounds tiny tear ducts
lacrimal bones (2)
forms the bridge of the nose
nasal bone (2)
compromising most of the body’s nasal septum
vomer bone
forms the sides of the nasal cavity
inferior concha (2)
lower jaw bone; largest and only moveable facial bone
mandible
what is the spine composed of?
33 stacked vertebrae
purpose of the spine
houses and protects the spinal cord
5 sections of the spine
- Cervical Region
- Thoracic Region
- Lumbar Region
- Sacrum
- Coccyx
C1 (atlas bone) connects with the ____ bone.
occipital
C1 enables ______ ?
nodding the head up and down and rotation left to right
what does the thoracic region do?
extends through the chest region and articulates with ribs
where is the lumber region of the spine located?
lower back
what does the sacrum consist of?
5 bones fused vertebrae
what does the sacrum form?
forms the posterior portion of the pelvic girdle
what does the coccyx consist of?
4 fused vertebrae
what does the coccyx form?
forms the tail bone at the bottom of the spine
What is the thoracic cage composed of?
sternum, ribs, and thoracic vertebrae
purpose of thoracic cage
surrounds and protects the heart and lungs
sternum is also called?
the breastbone
3 regions of the sternum
Manubrium, body, xyphoid process
upper portion that articulates or attaches to each clavicle (collarbone) and 1st an 2nd ribs
manubrium
the remaining bony portion of the sternum
body
projection of the lower end of the sternum
xyphoid process
how many pairs of ribs?
12 pairs
what do the first 7 pairs of ribs do?
attach directly to the sternum
name for the first 7 pairs of ribs
true ribs
role of rib pairs (8-10)
cartilage attachment to the seventh rib
name for ribs 8-10
false ribs
lowest pairs of ribs (11-12) role?
attach to any other structures
name for last two pairs of ribs (11-12)
floating ribs
STUDY THE SKULL AND RIBS FOR LABELING!!!!!
please ofc :^)
