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Skeletal system Dina

Made of organs called bones
adult bones 206
infant 350
axial skeleton main trunk of body
axial skeleton consists of skull spinal column ribs breastbone
axial skeleton has more of less bones less
appedicular skeleton extremities of the pelvic and shoulder girdles
appendicular skeleton consists of upper and lower extremities
appedicular skeleton has more or less bones more
Functions of the skeletal system framewrok for muscles fat and skinprotection for internal structures which surround vital organs ex skulls and ribs
production of blood cells is hematopoiesis or hemopoiesis which produces rbc wbc and platelets
storage calcium and phosphourus and fat
levers muscle attaches to bones to assist in movement
The bones of extremities are long or short bones long
diaphysis long shaft
epiphysis ends of bones
where is red marrow found proximal ends
what does red marrow produce rbs plt, and some wbc
what is red marrow used for used for diagnostic procedures
Where is the medullary canal located inside the diaphysis
what is medullary canal filled with yellow marrow
what is yellow marrow aka fat cells
endosteum is the membrane that lines medullary canal that keeps yellow marrow in tact and produces some bone growth
red marrrow is found proximal ends, vertebrae sternum ribs cranium
Function of red marrow produces rbc platelets wbc involved with bodys immune response
Periosteum outside of bone tough memebrane
periosteum necessary for bone growth, repair, and nutritioin
periosteum contains bld lymph vessels
osteoblasts- form new bone tissue
osteoclasts break down bone
articular cartilage thin layer that covers epiphysis aka shock absorber
skull is composed of cranial and facial bones
cranium spherical structure that surrounsd and protects the brain 8 bones of sukk
frontal forehead
2 parietal top of head
2 temporal temples
occipital back of head
ethmoid seperates nasal cavity from brain located at roof of the nose between the two orbits
how many facial bones 14
madible lower jaw
2 maxilla upper jaw
2 zygomatic cheeck
2 lactimal inner aspect of eyes
5 nasal upper part of nose
2 palatine roof of mouth hard palate
sutures areas where cracial have joined together
sinuses air spaces in bones of the skull that act as resonating chambers for the voice lined with mucous membrane
foramina openings in bones that allow nerves and bld vessels to enter or leave the bone
fontanels turn in to solid bone at 18 months of age soft spots allow for enlargement of skull as brain grows made of membrane and cartilage
spinal column has how many bones 26
function of spinal column protect spinal cord and provide support to head and trunk
7 cervical neck
12 thoracic chest
5 lumbar waist
sacrum back of pelvic girdle
1 coccyx tailbone
intervebral disks pads of cartilage tissue that seperate the vertebrae disks act as a shock absorber and permit bending and twisting movements of the vertebral column
ribs aka coste
how many pairs of ribs 12
ribs are attached to what thoracic vertebrae on dorsal aspect of body
true ribs first 7 pairs
true ribs attach to what sternum
false ribs are the last 5 pairs
1st 3 attach to cartilage of rib bone
last two floating ribs
floating ribs have no attachment to anterior aspect of body
sternum aka breast bone
sternum has 3 parts manubrium gladioulus and xiphoid
manubrium upper region
gladiolus body
ixphoid cartilage at end of sternum
2 clavicles attach to sternum at manubrium
ribs attach to sternum with costal cartilage
pectoral girld is made up of clavicles scapulas hunerous
humerous upper arm
radius lower arm on thumb side
ulna lower arm
olecranon process forms the elbow
carpals wrist
metacarpals palm of hand
phalanges fingers
bones of pelvic girdle consist of 2 os coxae
3 fused sections of pelvic girdle ilium ischium pubis
acetabula resessed socket attachement site for femur
oburator foramen opening for nerves and blod vessles
femur thigh
patella kneecap
tibia lower leg medial aspect larger boone
fibula lower leg lateral aspect slender bone fragile fibula
tarsals ankle
calcanous heel large tarsalw
metatarsals instep of foot
phalanges toees
Diathrosis joints freely moveable
ammphiarthoris slightly moveable
synarthrosis immovable
Created by: Dina DeMeo



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