Bones Flashcards
vertebral column
series of joints with small movement between joints
blood cell production
produced in bone marrow
pelvis
protects lower digestive system, bladder and reproduction
spine
- vertebral column protects spinal cord and nerves going to body
- flexibility
ribs
protect vital organs
skull
protects brain, made of several bones which fuse together
axial skeleton
mainframe
skeletal system functions
- foster movement
- shape and structure
- protection
how does skeletal system foster movement
bones have muscles attached to them with joints as pivot points
how does skeletal give shape and structure
support internal organs, give framework
3 body types
endomorph, mesomorph and ectomorph
endomorph
- soft round shape
- short limbs
- little muscle definition because body fat
- wrestling or weight lifting
mesomorph
- sturdy skeleton
- prominent muscle
- muscular limbs
- good at power sports
ectomorph
- slim build
- little muscle mass but good defenition due to no fat
- good at endurance
growth spurts
- growth quickens due to hormonal activity
- muscles ligaments and tendons slower to adapt to changes in size
osteoperosis
- bones get thinner and more fragile due to minerals lost in bones
- drop in estrogen is a cause
- when body levels are low in calcium takes it from bones
growing pains
bone growth quickens, muscles, ligaments and tendond adapt slower, weird coordination, stretching causes problems
peak bone mass not achieved until
25-30
weakest areas of growing skeleton
epiphyseal plates
epiphysial plates
areas of growing tissue in children and adolescents
foramen magnum
where spinal cord comes from brain and continues to back bone
how many vertabrae
33
vertebrae are connected by
facet joints
spinal cord runs through
neural canal
intervertebral disc
act as a cushion and absorb shock between vertebrae
what are the strongest vertebrae
lumbar
first 7 pairs of ribs are attached to
sternum
costal cartilage
attaches ribs to sternum
false ribs
cartilage attaching 8, 9, 10th ribs to sternum
floating ribs
not attached to sternum
osteocytes
bone cells
bone marrow stores
fat
yellow bone marrow produces
white blood cells
red marrow produces
red blood cells
red blood cells are produced in
Red blood marrow
White blood cells are produced in
yellow bone marrow
upper jaw
maxilla
lower jaw
mandible
6 main functions of skeleton
protection, movement, storage, production, muscle attachment, shape and structure
osteoclasts
removal of old bone
ossification
bone growth
bones adapt
to the stress placed on them
irregular bones
- non uniform shape
- vertebrae, sacrum, mandible
- mostly cancellous bone with thin outer layer of compact bone
cervical spine
first 7 vertebrae- c1-c7
flat bones
- strong flat pieces to protect vital organs
- sternum, breastbone, cranium
- base for muscular attachment
- anterior and posterior surfaces formed of compact bone to provide strength for protection
- center is cancellous
periosteum
- thin protective fiberous sheath around bone except the ends
- contains blood vessels to bring nutrients and transfer waste away
c2
axis bone
how many bones are there
203
long bones grow until
18
bones mature until
25
thoracic curve
kyphotic
bone cavity
- medullary cavity running down middle of shaft
- contains bone marrow
- produces r&w blood cells
5 types of bones
-long bones, short bones, irregular bones, sesamoid bones, flat bones
pregnancy
exaggeration of spinal curves
lumbar spine curves
concave
lumbar spine
5 vertebrae, l1-l5, very little movement
lordotic
inward
epiphysis
ends of bone where it widens to form a joint made of spongy bone
ischium
spits bones
compact bone
forms diaphysis, very dense and strong
what happens when bone stops growing
epiphysian plate fades which leaves a bony structure called epiphysial line
cartilage
tough smooth tissue that helps reduce friction between bones and provides shock absorbtion to joints
diaphysis
middle section of the bone
thoracic spine
12 vertebrae
t1-t12
part of ribs, go small to big
hyper-kyphosis
-exaggerated rounding of thoracic vertebrae, hunched, anterior shift of head, internal rotated arms, rounded shoulders
kyphatic
rounding or hump
hyper-kyphosis muscular set up
short pecs, longer lower trapezeus, short upper trapezeus, longer rhomboids
what part of spine is slightly mobile
thoracic spine
posture
optimal posture is the ability to hold yourself in neautral alignment with minimal muscle activity
osteoblasts
bone builders
what is the most mobile part of the spine
cervical
hyperlordosis
exaggerated inward curve of lumbar spine, hollow lower back, makes butt look bigger
poor sitting on posture
can shorten chest muscles and lengthen back muscles
types of long bones
femur, humerus, tibia, metacarpals, metatarsals, phalanges
elbow
primary hinge joint, additional joint that allows pronation and supination
cancellous
honeycomb structure, spongey bone in epiphysis
axial bones
skull, cranium, ribs, sternum, spine (core)
ilium
largest part of pelvis (flared), upper rim is called iliac crest
long bones
longer than it is wide, growth plates at either end, hard surface of compact bone, spongey innter called cancellous bone containing bone marrow
pelvic girdle
ilium, pubis, ischium
hyaline cartilage
covers bone, protects and aids in shock absorbtion
pubis
pubic bones form together to form cartilaginous joint
mineral storage
calcium, magnesium, phosphate which add strength and create bone density
growth plate (epiphysial plate)
- between epipysis and disphysis
- fused in adult bone
- where bone growth takes place
lumbar curve
concave or hollow curvature
appendicular
appendages
c1
atlas bone
two sections of bones
axial and appendicular
short bones
wide as they are long, primary function of support and stability, little movement, carpals and tarsals, thin layer of compact hard bone and large amounts of marrow
vertebral column
spine
sesamoid bones
short bones irregular bones embedded in a tendon, patella, pisiform, visually present in a tendon where it passes over a joint which serves to protect the tendon
scoliosis
s curve of spine, some vertebrae maybe rotated, congenital defect
8 weeks post conception, bones do…
skeleton bones have already formed in cartilage
normal spine alignment
4 curves- disperse shock, protect brain from shock
sacrum and coccyx
5 vertebrae fused together line up with ilium
tailbone
c1 and c2
pivot joint which allowes neck to rotate
why is bone more vulnerable while growing
more bone is cartilage, at risk from muscles pulling on tendons
ligament
tough fiberous tissue taht connects bones to bonestf