Epithelium: Part 1, Different Epithelium Intro

Question 1

What are the three embriological layers that give rise to all the rest?

Answer 1

ectoderme, mesoderme, endoderme

Question 2

Which layer gives rise to epithelial tissue?

Answer 2

ectoderme, mesoderme, endoderme

Question 3

What are the two kinds of epithelial tissues and their respective functions?

Answer 3

épithéliums de revêtement:
barrière entre deux compartiments, revêtant l’extérieur du corps et les cavités internes de l’organisme

le seul tissu capable de former une interface, d’empêcher le liquide interstitiel de s’écouler dans les espaces qu’il recouvre.

Les épithéliums glandulaires:
Fonction de sécrétion

Question 4

What are the 4 properties of epithelial tissue?

Answer 4

1. La cohésion cellulaire
   Les cellules sont bien collees. Pas d’espace entre les cellules
2. La polarisation des cellules
   Pol apical (vers l’exterieur)
   Pol basal
   urface laterale :entre les cellules
3. La présence d’une lame basale
   mince couche de protéines
   sécrétées par les cellules épithéliales
   assure la communication
   et les échanges entre le tissue épithélial et
   le tissu conjonctif sous-jacent
4. L’absence des vaisseaux sanguins
   la survie des
   cellules épithéliales sont localisés dans le
   tissu conjonctif sous-jacent
   Tous les échanges (apport d’oxygène et
   nutriments, élimination du CO2 et des
   déchets) se font exclusivement par
   diffusion à partir du tissu conjonctif sous-acent

Question 5

What is epidermis?

Answer 5

Skin tissue

Question 6

What is endothelium?

Answer 6

vasseaux sanguines

Question 7

What is mesothelium?

Answer 7

L’épithélium au niveau des membranes séreuses (pericarde)

Question 8

What kind of epithelium lines digestive tubes?

Answer 8

mucosal epithelium

Question 9

What is the first main classification of epithelium and what are the three types?

Answer 9

Based on the number of layers
We have:
Simple epithelium,
Stratified Epithelium
Pseudo Stratified Epithelium

Question 10

Given these layers of epithelial cells from deepest, name the type of tissue:

Cuboid, Pavimeteaux, Pavimeteaux, Cuboid, Cylindrical

Answer 10

Startifiel Cylindric Epithelial

We look at the most surface layers

Question 11

What kind of tissue would line a vein and what is its specific name?

Answer 11

epithelium pavimenteux simple
endothelium

Question 12

What kind of tissue would line kidneys (Tubes rénaux) ?

Answer 12

Cuboid simple epithelium

Question 13

Where might you find prismatique (Cylindrical) simple epithelium?

Answer 13

Tube collecteur rénal, small intestine

Question 14

If you are looking at epithelium pavimenteux stratifie keratinize, what kind of tissue might you be looking at?

Answer 14

Skin

Question 15

If you are looking at epithelium pavimenteux stratifie non-keratinize, what kind of tissue might you be looking at?

Answer 15

Cheeks, vagina walls

Question 16

In contrast to the kidney, in this organ we find stratified cuboid epithelium.

Answer 16

canal excreteur de Sudoripare (sweat) glande

Question 17

What kind of epithelium lines the trachea?

Answer 17

Prismatique Pseudo stratifie

Question 18

Where might you find Prismatique Pseudo-stratifie?

Answer 18

Trachee

Question 19

What is Épithélium de transition and where might we find it?

Answer 19

It is epithelium that can change shape based on the state of the organ

This is found in the urinary bladder and it is squished when the bladder is filled