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Cartilage CONNECTIVE TISSUE MESODERM (FUNCTIONS & PROPERTIES (primary…
Cartilage
CONNECTIVE TISSUE
MESODERM
CELLS
Chondrocytes
Chondroblasts
FUNCTIONS & PROPERTIES
firm but flexible support
shock absorber
avascular
cells sit in
lacunae
primary fiber:
collagen type II
retain water
LOCATION
external ear, nose, lower respiratory tract, articular surfaces
GROWTH
APPOSITIONAL
differentiation from
PERICHONDRIUM
,
secrete matrix
:arrow_right:
CHONDROCYTE
INTERSTITIAL
cell division, existing cells
:arrow_right:
isogeneous group
4-8 cells of related cells
lengthening of bones
:star: babies mostly made of cartilage skeleton
TYPES
Hyaline
most common
@ joints, nose, larynx, trachae, bronchi, :star: embryonic skeleton
macromolecules
PROTEOGLYCANS/GAGs
hyaluronic acid
keratin sulfate
chondroitin sulfate
Glycoprotein
chondronectin
Type II collagen
Blue in H&E
Elastic
@ external ear, epiglottis
special stain needed
where rebound is needed
elastic fibers
Fibrocartilage
where support and
tensile strength
are needed
@ capsules of joints, pubic symphysis, intervertebral discs
Types I & II collagen
structure btw cart. and
dense regular
connective tissue
pink w/fibers
lacunae