module 4 skeletal system Flashcards
What is the function of the skeletal system
protect vital organ
What is the skeletal system
network of bone held together by various joints
What does bone store
inorganic calcium and phosphorus salts
What are the 5 types of bone
long, flat, short, irregular, sesamoid
What is a bone landmark
distinct marking for the bone such as ridge, groove or hole
What is the function of various bony landmarks
allow tendon to stretch, indicate where nerves and blood vessels run alongside the bone
What do terms foramen, canal, and fissure mean
opening in bone to allow nerves, blood spy to pass
What does sinus mean in the skeletal system
hollow chamber in bone: usually filled with air
What does the term process and ramps mean
elevation in bone
What are trochanter, tuberosity, tubercle, crest, spine
processes or projections for tendon or ligament attachments
What does head, neck, condyle, trochlea, facet mean
processes designed for articulate with adjunct bones
What does fossa and sulcus mean
depression in bone
What are the 2 divisions of the skeletal system
axial and appendicular
Where does axial division lie and what is in this division
lies on midline of body
consists of skull, vertebral column, laryngeal skeleton and thoracic rib cage
How many bones make up the skull
22
8 in cranium and 14 in facial
What are fontanelles
soft softs in newborns where the cranium bones have not fused together yet
What are the names of the bones in the cranium and describe them
frontal- 1 bone
parietal: 2- on each side
occipital-1 forms base of skull- contain foramen magnum
temporal bone- lead to middle ear
sphenoid bone- complete side of skull: contribute to floor and wall of eye socket
Ethmoid bone- lie in sphenoid: part orbital wall and nasal septum
Describe the sinuses
airspace lined by mucous membrane
reduce weight of skull and give resonant sound to voice
What are mastoid sinuses
2 sinuses that drain into middle ear
What can mastoiditis lead to
deafness from inflammation of mastoid sinuses
What is sinusitis
sinus infection: occur when soft tissue in sinuses become inflamed from virus, allergy, bacteria
What is foramina
allow passage for blood vessels, nerves and spinal cord
what is foramen magnum
allow spinal cord to pass into skull
what is carotid canal
opening of temporal bone for internal carotid artery
what is external acoustic meatus
transmission of sound in temporal bone
what is the mandible
facial bone: lower jaw: only moveable part, non- paired bone
describe maxilla
upper jaw, facial bone, form anterior portion hard palate, contain infraorbital foramen
describe zygomatic bone
cheek bones
describe nasal bones
bridge of nose
describe palatine bones
posterior portion of hard palate and floor of nasal cavity
describe lacrimal bone
lie between ethmoid bone and maxillary bone
describe vomer
thin, flat, join with perpendicular plate of ethmoid to form nasal septum- with mandible is non-paired bone
describe inferior nasal conchae
located inferior to middle conchae
what is middle and superior nasal conchae
formed from groove of ethmoid bone
swirls air as breath to warm and humidify before entering lower respiratory system
What is the vertebral column
extend skull to pelvis
has 4 curvature- provides resistance and strength
vertebrae in cervical, thoracic, lumbar, sacrum and coccyx
What are spinous processes
located dorsal side of vertebrae and palpated along midline of neck and back
where is the most surface area of the vertebral column
anterior portion
What are articular facets
allow adjacent vertebrae to articulate with each other
Describe cervical vertebrae
long spinous process: with bifid tip that split into 2 part
bodies are small
vertebral foramen are large
transverse process: transverse foramen for pass arteries and veins
Describe thoracic vertebrae
long thin spinous process does not split
spinous points inferiorly
vertebral bodies medium sized
contain facet for rib articulation
transverse process has costal facet for rib articulation
T11-T12 don’t have facet for rib articulation
Describe Lumbar Vertebrae
shorter spinous process broader and points posteriorly
vertebral body of lumbar spine are largest to support with of head, neck, trunk and upper limb
transverse process: shorter- no costal facet
vertebral foramen: smallest and triangle shaped
Describe Sacrum
5 fused bones @ base of spine
base is widest and articulate with L5
Describe Coccyx
4-5 fused vertebrae- fused about age 25
sacrum and coccyx= attach site for many ligament and tendon
what is key for pelvic stability
anchoring of sacrum, coccyx and ligaments to pelvis
Where do all 12 pairs of ribs connect
posterior thoracic vertebrae
What are ribs 1-7 called and where do they connect
true ribs
connect to sternum directly
What are ribs 8-10 called and where do they connect
false ribs
connect to sternum indirectly via shafts of cartilage
What are ribs 11-12 called and where do they connect
floating ribs
only connect posterior thoracic vertebrae no the sternum
What are the 3 parts of the sternum
manubrim
body
xiphoid process
What is included in appendicular skeleton
bones in pectoral and pelvic girdle attached to limbs
what is the pectoral girdle
shoulder and upper limbs
special for flexibility, and increased ROM
what is the pelvic girdle
pelvic bones and lower limb special for strength
What makes up the pectoral girdle
shoulder: 2 clavicles and 2 scapulae
Where does clavicle connect
connect with sternum anteriorly
connect with scapula posteriorly
What is the scapula
freely movable, held in place by muscles and ligaments
What are specific landmarks of posterior scapula
supraspinatus fossa, infraspinatus fossa, scapular spine