Respiratory Histology 1

Question 1

What are the parts of the conductive portion of the respiratory tract?

Answer 1

Voies aériennes supérieures
* Cavité nasale
* Pharynx
* Larynx

Voies aériennes inférieures
* Trachée
* Bronches
* Bronchioles

Question 2

What are the layers of the respiratory tract tubes?

Answer 2

Muqueuse: épithélium + lamina propria (chorion)
Sous-muqueuse: tissu sous la lamina propria

Question 3

True or False, all of the conducting resporatory tracts is lined by Pseudo Stratified Epithelium and contains ciliated cells:

Answer 3

FALSE,
Ciliated Cells: Movement of mucus towards the outside

Found everywhere in the “système conductrice”

(except vocal cords)

They have stratified squamous non-keratinized epithelium

Question 4

TRUE or FALSE , the respiratory system contains Cillia not Microvili

Answer 4

TRUE

Question 5

What kind of glandes do we find in the respiratory tract and at what level?

Answer 5

sous-muqueuse
séromucineuses and goblet

Question 6

What is Glande de Bowman?

Answer 6

Just a sero-mucinous gland at the Région olfactive

Question 7

What is the property of olfactive cilia?

Answer 7

Très long,
immobiles

Question 8

What are some key property of the pharynx in relation to the immune system?

Answer 8

Zone partagée entre le système respiratoire et digestif
Lamina propria et sous-muqueuse: tissu lymphoïde +++

Question 9

Lamina propria vs sous-muqueuse in the trachea. Location des capillaire, type de tissu conjonctif, vaisseau lymphatique

Answer 9

• Lamina propria:
  –++ capillaires, lymphatiques
  –Tissu conjonctif un peu plus dense
• Sous-muqueuse:
  –Moins de capillaires, lymphatiques
  –Tissu conjonctif plus lâche
  –Glandes

Question 10

Put these in order or gas passage:
bronchiole respiratoire
acinus
sac alvéolaire
bronchiole terminale
alvéoles
bronche segmentaire
canal alvéolaire

Answer 10

bronche segmentaire
bronchiole terminale
bronchiole respiratoire
acinus
canal alvéolaire
sac alvéolaire
alvéoles

Question 11

What increases and what decreases as you go from terminal bronchioles to alveoles?

Answer 11

Diminution progressive :
* Hauteur de l’épithélium
* Nombre de cellules en gobelet
* Nombre de glandes sous muqueuses
* De la quantité de cartilage (arceaux
incomplets)

Augmentation progressive:
* Couches musculaires lisses

Question 12

At what level might we not find any more cartilage?

Answer 12

Au niveau des bronchioles il n’y a plus de cartilage

Question 13

At what point do we see cellules de clara?

Answer 13

Bronchiole terminale
Remplacement graduel de
cellules à gobelet par des cellules
de « club » (Clara)

Question 14

Bronchiole respiratoire properties:

Answer 14

Épithélium cilié cubique et
cellules de “club”

Absence de cellules caliciformes

Muscle lisse
Fibres élastiques

Question 15

Alvéoles properties:

Answer 15

Épithélium
* Pneumocytes de type I
* Pneumocytes de type II

Tissu conjonctif
* Membrane basale

Vaisseaux sanguins
* Capillaires = cellules endothéliales

Question 16

What is Canaux de Lambert?

Answer 16

voie de communication Canaux de Lambert
Bronchioles terminales <-> alvéoles

Question 17

What are Pores de Kohn

Answer 17

voie de communication Alvéoles <-> alvéoles

Question 18

Why do we say that the lungs have a double innervation?

Answer 18

(Major) Pulmonary arteries and Veins
Pulmonary artery brings blood to the alveoli → capillaries → gas exchange → blood is sent back via pulmonary veins
The veins travel in the interlobular septas (continous with the plevre)

Bronchique Arteries and Veins:
Important for feeding bronchic tissue

Question 19

Where do Vaisseaux lymphatiques travel in the lungs?

Answer 19

localisés principalement dans la plèvre et dans les septas interlobulaires

therefore close to pulmonary veins

Question 20

What is La plèvre? What are its characteristics?

Answer 20

The equivalent of a pericardium but for lungs

Visceral part contains Cellules mésothéliales, tissu conjonctif,
et vaisseaux lymphatiques