Skeletal system Flashcards
blood cell formation
hematopoiesis
2 basic osseous tissues
Compact & spongy bone
bones that form within tendons
Sesamoid bones
does not fit into other bone classification
categories
Irregular bones
; Shaft - length
Composed of
compact bone
Diaphysis
Ends of the bone
Composed mostly of
spongy bone
Epiphysis
Supply bone cells
with nutrients
Arteries
Reveal where muscles tendons and ligaments attach and where blood vessels and nerves pass
Bone markings
2 categories of bone markings
Projection & Depression
indentations in the bone
Depression or cavity
Cavity of the shaft
Contains yellow
marrow (mostly fat)
in adults
Contains red marrow
(for blood cell
formation) in infants
Medullary cavity
mature bone cells
osteocytes
osteocytes are found in the:
lacunae
the structural and functional unit of compact bone
osteon
give bones hardness
Calcium salts
provides bone flexibility
Collagen fibers
process of bone formation
ossification
bone building cells
osteoblast
process in which bones increase in diameter
appositional growth
giant bone destroying cells
osteoclasts
6 fracture types
Comminuted
Compression
Depressed
Impacted
Spiral
Greenstick
bone breaks into 3 or more fragments ; older people
comminuted
bone crushed; porous bones
compression
broken bone portion is pressed inward ; typical skull fracture
depressed
broken bone ends are forced into each other ; attempting to break a fall without outstreched arms
impacted
excessive twisting ; common sports fracture
Spiral
bone breaks completely; common in children where bones are flexible than those of adults
Greenstick
4 major events of (repair of bone fractures)
Hematoma forms
Fibrocartilage forms
Bony forms
Bone remodelling occurs
How many bones are there in a cranium
8 large flat bones
Axial bones:
skull
vertebrae column
thoracic cage
forms bony projections under eyebrows
Frontal bone
largest vein in the head
jugular vein
supplies blood most to the brain
internal carotid artery
lighten the skull bones & amplify the sounds we make as we speak
paranasal sinuses
only bone in the body that does not form a joint
Hyoid bone
cushions vertebrae & absorb shock while allowing spine flexibility
intervertebral disc
wraps tendon subjected to friction
tendon sheat
contains osteocytes
lacunae
rings central canal ; SITES OF LACUNAE
lamellae
forms transportation system ; connecrs bone cells to nutrient supply and waste removal services
canaculi
allow for growth of long
bone during childhood
Epiphyseal plates
Bone fractures are treated by:
reduction and
immobilization
Forms a
cage to
protect major
The Bony Thorax
The Appendicular Skeleton have how many bones
126
shoulder girdle attaches to the
axial skeleton
the pelvic girdle is composed of how many bones
3 bones
ilium
ischium
pubic bone
The heaviest and
strongest bone in
the body
femur
immovable joints:
slightly moveable:
freely moveable joints:
Synarthroses
AMPHIARTHROSES
DIARTHROSES
Structural Classification of Joints:
Fibrous joints
Cartilaginous joints
Synovial joints
Bones connected by cartilage
Examples
Pubic
symphysis - pelvis
Intervertebral
joints – spinal column
inflammation of a bursa usually caused
by a blow or friction to the knee
Bursitis
inflammation of tendon sheaths -
sprain
Tendonitis
inflammatory or degenerative diseases
of joints
Arthritis
wear-and-tear arthritis
Most common chronic arthritis
Probably related to normal aging processes
osteoarthritis
An autoimmune disease – the immune system
attacks the joints
Symptoms begin with bilateral inflammation of
certain joints
Often leads to deformities
Rheumatoid arthritis