Histo - Images

Question 1

Where in the respiratory tract would you find this type of epithelium? Type of epithelium?

Answer 1

Nasal cavity

PSCC

Question 2

What is the function of the cells directly under the PSCC cells?

Answer 2

Basal cells - stem cells for ciliated and goblet cells

Question 3

What is the blue-staining area? What does it contain?

Answer 3

Lamina propria

Blood vessels, lymphocytes and other immune cells, seromuocus glands

Question 4

Where would you find this PSCC epithelium?

Answer 4

Nasal cavity

Question 5

Name the dark pink, elongated cell and its function

Answer 5

Supporting cell

Provides metabolic and physical support to olfactory cells

Question 6

Name the yellow elongated cells and their function

Answer 6

Olfactory cells

Basal processes collectively form olfactory nerve for odor transduction

Question 7

Name the short dark pink cells and their function

Answer 7

Basal cells

Regenerate other cells

Question 8

Name the outer layer and what it consists of

Answer 8

Adventitia/serosa

Connective tissue w/ or w/o mesothelial layer

Question 9

Name the layer under the adventitia and what it consists of

Answer 9

Muscularis externa

Smooth muscle in inner circular layer and outer longitudinal layer

Question 10

Name the layer under the muscularis externa and what it consists of

Answer 10

Submucosa

Connective tissue

Question 11

Name the layer under the submucosa (duh!) and what it consists of

Answer 11

Mucosa

Epithelium, lamina propria (c.t.), muscularis mucosa

Question 12

Where are we in the respiratory tract?

Answer 12

Larynx

(notice transition from PSCC on left to simple squamous on right)

Question 13

What is the yellowish material?

Answer 13

Hyaline cartilage forming C-shaped ring in trachea

Question 14

What else is surrounding the tracheal lumen besides hyaline cartilage?

Answer 14

Trachealis muscle

Question 15

What is the narrower lumen at the top of the slide?

Answer 15

Esophageal lumen

Question 16

Where in the respiratory tract are we?

Answer 16

Trachea

(notice the hyaline cartilage and PSCC)

Question 17

What is the orange arrow pointing to?

Answer 17

Basement membrane

Question 18

What is the blue box encompassing? What cells are present?

Answer 18

Lamina propria

Lymphocytes

Question 19

What is the red box encompassing? Red circle?

Answer 19

Submucosa

Seromucous gland

Question 20

What is the green box encompassing?

Answer 20

Hyaline cartilage layer

Question 21

Where in the respiratory tract are we?

Answer 21

Posterior tracheal wall

(notice thick trachealis muscle layer)

Question 22

Where are we in the respiratory tract?

Answer 22

Trachea

(THICK BM and thick trachealis muscle layer)

Question 23

Where in the respiratory tract are we?

Answer 23

Intrapulmonary bronchi

(cartilage now in plates)

Question 24

Where in the respiratory tract are we?

Answer 24

Intrapulmonary bronchi

(Red circle = appearance of MUSCULARIS MUCOSA

Blue box = cartilage plate)

Question 25

Where in the respiratory tract are we?

Answer 25

Bronchiole

Question 26

What is no longer present at this level?

Answer 26

Submucosa (and its glands) We're looking at a bronchiole

Question 27

What is present at this level that would not be found in the trachea or upper airways?

Answer 27

Muscularis mucosa (IS present in intrapulmonary bronchi and down)

Question 28

What special cell type is present in this structure and what is its purpose?

Answer 28

Clara cell Secrete a surface-active protein, CC16

Question 29

Where in the respiratory tract are we?

Answer 29

Respiratory bronchiole | (notice that part of it has alveoli)

Question 30

What type of epithelium is present?

Answer 30

Ciliated cuboidal

Question 31

What is the area marked in black box? Orange box?

Answer 31

Bronchiole Terminal bronchiole

Question 32

What are the green circles encompassing?

Answer 32

Respiratory bronchioles

Question 33

What is this? What do "SM" and "A" stand for?

Answer 33

Surface of a respiratory bronchiole Smooth muscle and alveoli

Question 34

What is the structure denoted by the black arrow? Red circles?

Answer 34

Alveolar duct (almost no walls; boundaries made up of alveoli) Alveolar sacs

Question 35

Which arrow points to the type I pneumocyte? Type II pneumocyte?

Answer 35

Orange Purple

Question 36

What is the function of the cell denoted by the blue arrow?

Answer 36

Macrophage - scavenges inhaled material and either travel to the throat where they're swallowed as mucus or retreat to the alveolar septum where they can remain quiescent for years (think recurrent TB)

Question 37

Which cell can be known as a heart failure cell?

Answer 37

Macrophage (blue arrow) - scavenge RBCs during heart failure = heart failure cell

Question 38

What is the function of the area marked by the blue arrow?

Answer 38

Thick region of alveolar septum - contains macrophages, fibroblasts, and fibers that intervene between alveolus and capillary

Question 39

What makes up the region marked by the purple arrow?

Answer 39

Thin region of alveolar septum - type I pneumocyte, endothelial cell of capillary, fusion of basal lamina from both cell types, thin layer of surfactant

Question 40

What is the function of the area marked by the purple arrow?

Answer 40

Gas exchange (thin region)

Question 41

What structure is marked in red? Orange?

Answer 41

Bronchiole Pulmonary artery

Question 42

What structure is marker in yellow? Green?

Answer 42

Terminal bronchiole (notice it gives off resp bronchiole) Respiratory bronchiole (notice the alveoli coming off)

Question 43

What area is marked in blue? Purple? Grey?

Answer 43

Arteriole Alveolar duct Branch of pulmonary vein and capillary bed

Question 44

At what level do the pulmonary arterioles form the structure marked by the purple arrow?

Answer 44

Level of alveolar duct (arrow = capillary bed)

Question 45

What structure is marked in black? Yellow?

Answer 45

Alveoli Connective tissue

Question 46

What is the function of the small dark holes (ha)?

Answer 46

Alveolar pores of Kohn - allow airflow between alveoli when normal airspace is occluded

Question 47

What structure is marked by the green arrow? Purple arrows? Yellow arrow?

Answer 47

Type I pneumocyte Type II pneumocytes Alveolar pore of Kohn