Connective Tissue 2: Flashcards
What are the properties of cartilaginous tissue?
Non Vascularized
No Nerves
No lymphocytes
La nutrition du cartilage et les échanges métaboliques se font par diffusion avec le périchondre (liquid synovial)
What is the difference in presentation of cartilaginous tissue between the fetus and adult?
constitue la plus grande partie du squelette chez le fœtus: l’ébauche
initiale des os long
Distribution limitée chez l’adult
arbre respiratoire, conduit auditif externe, trompe d’Eustache, nez
articulations mobiles, jonction côtes-sternum
What is the main collagen type in the ECM of cartilaginous tissue?
Collagen Type II
What is a Aggrécane?
Agrégats de protéoglycanes sont beaucoup plus volumineux que ceux dans le TC et forment un complexe particulièrement grand:
What is chondronectine?
glycoprotéine, la chondronectine, qui assurent la liaison entre les fibrilles de collagène et les protéoglycanes
What are the main cells of cartilaginous tissue?
Les cellules chondrogéniques:
Les chondroblastes:
Chondrocytes:
Where do we find and what is the role of cellules chondrogéniques?
At the périchondre interne
Can divide to give chondroblastes
Where do the collagen fibers come from in the cartilaginous tissue?
chondroblastes
Where do we find chondrocytes?
Inside the cartilage
Inside chondroplasts
TRUE OR FALSE, The components of the ECM in cartilaginous tissue are fibers, elastin as well as fundamental tissue.
FALSE
No elastin in cartilaginous tissue
What are the two layers of perichondre and their associated fibers?
Une couche externe: collagène de type I.
Une couche interne: collagène de type II
TRUE OR FALSE, cartilaginous tissue and its périchondre are poor in blood supply.
FALSE,
Le périchondre est richement vascularisé et il nourrit le cartilage qui est dépourvu de vaisseaux.
What are the three types of cartilage?
- Le cartilage hyalin
- Le cartilage élastique
- Le cartilage fibreux ou fibrocartilage
What is the main collagen type found in 1. Le cartilage hyalin?
Collagen type II
What are the two types of hyalin cartilage?
Articulaire:
Non-Articulaire:
What is the main property of cartilage hyalin Articulaire and what does this mean?
Sans périchondre → Will get all nutriments from Liquide Synovial
This is what we find at bone joints
What is the main property of cartilage hyalin non-Articulaire and where do we find it (2)?
Entouré de périchondre
Trache et des Bronches Pulmonaires
What kind of fibers do we see in the ECM of cartilage élastique?
Collagen type II (and elestic fibers)
Main place we find cartilage élastique?
The epiglottis
What is cartilage fibreux ou fibrocartilage a combination of?
Dense connective tissue proper-> a lot of collagen type I
Cartilage -> collagen type 2
True of False, just like cartilage articulaire, fibrocartilage does not have any perichondre.
True
Where do we find cartilage fibreux ou fibrocartilage?
In the intervertebral discs
What are the two growth ways of cartilogenous tissue?
Appositionnelle:
From Perichondre From exterior → chondrogenic cells → chondroblasts → chondrocytes
Seen in pre-natal and new-borns
Interstitielle:
Division of Chondroblasts and Chondrocytes
They cannot reproduce forever → this is why we have joint pain 😟
Chondrocytes ont la capacité de se diviser, ce qui créent des « nids » de cellules, ou des groupes isogéniques
What is the main reason of joint pain?
Interstitielle: growth of cartilage
They cannot reproduce forever → this is why we have joint pain 😟
What are groupes isogéniques?
Les chondrocytes ont la capacité de se
diviser, ce qui créent des « nids » de cellules,
ou des groupes isogéniques.
La déposition de matrice extracellulaire
sépare les cellules qui résultent de la mitose,
mais elles restent en proximité les unes des
autres.
