cartilage histo Flashcards
a special form of CT – rigid matrix
made up of cells & matrix
with collagen and elastic fibers in matrix
with perichondrium – dense fibrous CT
avascular
functions – provide structural support & flexibility
cartilage
classification of cartilage based on the kind & abundance of fibers
- Hyaline cartilage
- Elastic cartilage
- Fibrous cartilage
most common type
in embryo – skeletal model for bones
in adults – for structural support
hyaline cartilage
hyaline
3 subtypes:
Adult hyaline
Articular hyaline
Fetal hyaline
location of adult hyaline
– resp. system
surrounded by perichondrium
found in matrix – chondrocytes in lacunae
cell nest / isogenous group in single lacunae
matrix appears homogenous
interterritorial matrix & territorial / capsular matrix
collagen fibers abundant in intercapsular matrix
adult hyaline cartilage
no perichondrium in articulating surfaces
more & bigger chondrocytes
matrix
avascular
articular hyaline cartilage
location of fetal hyaline
skeletal system of embryo exc. face & skull
w/ young chondroblasts; numerous, small, irreg. arranged no cell families matrix being formed avascular with perichondrium
fetal hyaline cartilage
functions of fetal hyaline cartilage
Functions:
framework for endochondral ossification
represents early stage in the dev. of all types of cartilage
w/ elastic fiber in matrix – more flexible w/ perichondrium fewer cell families avascular fatty degeneration modification of adult HC
elastic cartilage
location of elastic cartilage
eustachian tube, epiglottis, etc
location of location of fibrocartilage
– intervertebral disc, tendons to bones
Types of cartilage Growth
Interstitial / Endogenous growth
Appositional / Exogenous growth
type of growth
takes place in the middle portion of the cartilage
mutiplication of chondrocytes & prod. of new matrix fr. within
inc. in size & length of cartilage by hyperplasia
can occur if the cartilage is soft & yielding
Interstitial / Endogenous growth
