Respiration Lecture 15: Histology Flashcards Preview

Undeleted > Respiration Lecture 15: Histology > Flashcards

Flashcards in Respiration Lecture 15: Histology Deck (44):
1

respiratory tract

tubular system that extends from nares to lungs

2

Functions of resp. tract

1) warm/moisten air
2) detect odorant molecules
3) conduct air to lungs
4) gas exchange with blood
5) minimize entry of ingested food and fluid
6) produce vocalizations
7) trap/eliminate foreign particles
8)combat microbes

3

Type of epithelium in vestibular region

nonkeratinized stratified squamous epithelium

4

2 types of epithelium in respiratory region

respiratory + olfactory ep.

5

4 main components of nasal cavity

1) vestibular region
2) respiratory region
3) paranasal sinuses
4) vomeronasal organs

6

philtrum

area between nostril and mouth

7

respiratory epithelium =

pseudostratified ciliated columnar epithelium

8

4 main cell types found in resp. ep.

goblet, ciliated, basal, and brush cells

9

olfactory epithelium =

pseudostratified ciliated columnar epithelium

10

3 main cell types found in olfactory ep.

sustentacular, olfactory, and basal cells. NO GOBLET CELLS

11

where are Bowman's glands found and what do they do?

Beneath olfactory epithelium; secretion dissolves odor-producing substances

12

Paranasal sinuses fx

provide thermal and mechanical protection to orbits, nasal and cranial cavities; add resonance to vocalizations

13

T or F: pig has more extensive paranasal sinus than dog

T

14

What is paranasal sinus lined by?

Resp. ep.

15

What is vomeronasal organ lined by?

Resp. and Olf. ep., cartilage

16

vomeronasal organ fx

detect pheromones involved in social and mating behaviors

17

What is nasopharynx lined by?

resp. ep. (pseudostratified ciliated columbar ep.) Is around the soft palate

18

What is larynx lined by?

stratified squamous and resp. ep.

19

Epiglottis is lined by:

Non-keratinized stratified squamous epithelium that interdigitates with the lamina propria

20

Epithelium in trachea

respiratory ep.

21

where is trachealis m. in dog vs. ox?

dog-outside smooth muscle ring; ox-inside ring

22

Tunic layers from inside to outside of tubular organ (4)

1)Tunica mucosa (lines lumen)
2)Tunica submucosa (often contains glands)
3)Tunica muscularis
4) Tunica serosa or adventitia

23

Main secretory cell type in tracheal epithelum of domestic mammals

goblet cells

24

lamina muscularis mucosae in trachea contains

elastic fibers

25

muscularis externa in trachea contains

joining of trachealis m. and cartilage

26

conducting airways of bronchial tree

trachea + extrapulmonary bronchus

27

transitional/respiratory bronchioles

char. by direct attachment of alveoli; not present in all species. Between terminal bronchioles and alveolar ducts. Participate in gas exchange

28

Granular (Type II Pneumonocytes)

Thicker and less numerous than Type I. Secrete surfactant. Aka septal cells

29

Membranous (Type I) pneumonocytes

squamous cells that line alveolar wall. Thin cells, where gas exchange takes place. Surround capillaries

30

2 kinds of macrophages in lung tissue

septal (remains w/n connective tissue septa) and alveolar (on alveolar lining, or free in lumen). Scavenge for particulates and move them upward and out via cilia

31

Passage of air from bronchiole to alveoli

bronchiole -->alveolar duct -->atrium --> alveoli

32

air-blood barrier components

1)surfactant
2)alveolar membrane
3)interstitial fluid
4)basal laminae of pneumonocyte and enothelium
5)endothelial cell
6)blood plasma
7)red blood cell

33

what does bronchial artery supply?

resp. structures

34

What vessels supply gas exchange system?

pulmonary a., alveolar capillaries, pulmonary vein

35

What innervates resp. system?

Parasympathetic --> vagus (bronchoconstriction)
Sympathetic --> T2-T4 (bronchodilation)

36

respiratory distress syndrome

lungs collapse and fail to expand

37

Immotile cilia (Kartagener's) syndrome

leads to chronic resp. infections

38

Tracheal hypoplasia

narrowed airway due to abnormal devel. of cartilage rings

39

T or F: avian hyaline cartilage rings are complete

T

40

Which components of avian resp. system are lined with resp. epithelium?

Trachea primary bronchi, mesobronchus

41

Where is lymphatic tissue located in resp. system of birds?

lamina propria of bronchi

42

avian ventilation circuit

bronchus --> caudal sac --> lung --> cranial sac --> out

43

Syrinx

where trachea forks into lungs in birds. Where sound is produced via vibrations of typmaniform membrane and pessulus

44

theory of gastric CO2 prod. and ventilation

during resp. acidosis, excess CO2 travels from gastric artery to stomach and out esophagus

Decks in Undeleted Class (134):