1. Respiratory tree Flashcards Preview

Respiratory > 1. Respiratory tree > Flashcards

Flashcards in 1. Respiratory tree Deck (30):
1

Respiratory tree - 2 zones

1. Conducting zone
2. respiratory zone

2

Conducting zones constist of

1. large airways (nose, pharynx, larynx, trachea, bronchi)
2. small airways (small bronvhioles, terminal bronchioles)

3

Conducting zones - large airways

1. nose
2. pharynx
3, larynx
4. trachea
5. bronchi

4

Conducting zones - small airways (characteristivs)

terminal bronchioles --> large number in paraller --> least airway

5

Least airway resistant (why)

terminal bronchioles ( LARGE NUMBRT IN PARALLEL)

6

conducting zones - function

warms, humidifies, and filters air but does not participate in gas exchange --> anatomic dead space

7

conducting zone -histology

1. cartilage and goblet extent to end of bronchi
2. pseudostratified ciliated columnar cells extend to beginning of terminal bronchioles, then transition to cuboidal cells ( clear mucus and debris (mucociliary elevator))
3. Airway SMCs extend to end of terminal bronchioles and sparse beyond this point

8

Pseudostratified ciliated columnar cells - function

clear mucus forom lungs (mucociliary elevator)

9

res[iratory zone - function

it participates in gas exchange

10

respiratory zone - consist of

lung parenchyma (respiratory bronchioles, alveolar ducts , alveoli)

11

Lunh parenchyma consist of

respirtatory bronchioles, alveolar ducts, alveoli

12

respiratory zone - histology

mostly cuboidal cells in respiratory bronchioles, the simple squamous cells up to alveoli
-Cilia terminate in respiratory bronchioles
alveolar macrophages

13

Alveolar macrophages - functionc

clear derbris and participate in immune response

14

respiratory tree - area of cilia

terminate in respiratory bronchioles

15

respiratory bronchioles histology - mostly cells in respiratory bronchioles

cuboidal cells

16

Smoorh muscle cells area

extend to end of terminal bronchioles and sparse beyond this point

17

Pseydostratified ciliated columnar cells

extend to beginning of terminal bronchioles

18

respiratory tree - pseudostratified ciliated coluoidal cellsmnal cells extend to ... and transiition to

beginning of terminal bronchioles
cuboidal cells

19

cartilage extend to

end bronchi

20

golblet cells extend to

end of bronchi

21

Which structures make up the large airways of the conducting zone of the respiratory tree? The small airways?

Large airways = nose, pharynx, larynx, trachea, bronchi; small airways = bronchioles, terminal bronchioles

22

Which part of the conducting zone of the respiratory tree has the least airway resistance?

At the terminal bronchioles. where a large number of them run in parallel

23

Name the three functions of the conducting zone of the respiratory tree.

The conducting zone warms, humidifies, and filters air

24

Which zone of the respiratory tree includes the anatomic dead space?

The conducting zone (by definition, dead space does not participate in gas exchange)

25

Cartilage and goblet cells extend to the end of the respiratory ____ (bronchioles/bronchi).

Bronchi

26

Conducting zone epithelium is ___ (cuboidal/pseudostratified ciliated columnar) and ___ (cuboidal/simple squamous) in terminal bronchioles.

Pseudostratified ciliated columnar (cilia beat to remove mucus and debris), cuboidal

27

What type of muscle is found in the walls of the conducting airways, and up to where does it extend?

Smooth muscle; end of terminal bronchioles (beyond that point, it is sparse)

28

What anatomic area does the respiratory zone encompass, and what is the major function?

The lung parenchyma: respiratory bronchioles, the alveolar ducts, and the alveoli all function in gas exchange

29

What type of epithelial cells is found in respiratory bronchioles?

Predominantly cuboidal cells

30

A patient aspirates debris into his lungs. Other than cilia, what helps clear the debris?

Alveolar macrophages (also participate in the immune response)