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CRRAB II - Anatomy/Embryology/Histology > Conducting Division Histology > Flashcards

Conducting Division Histology Flashcards

0
Q

What are the components of the conducting division?

A

Nasal cavity, nasopharynx, oropharynx, mouth
larynx
trachea
bronchi/bronchioles

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1
Q

Functions of the respiratory conducting division?

A

Moistens, warms/cools, and filters air
Delivers air to respiratory division
Decreases velocity of air due to increased cross sectional area

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2
Q

What is the choanae?

A

The area the nose opens to nasopharynx

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3
Q

What is the histology of the anterior portion of the nasal cavity?

A

lined with skin
Coarse hairs (vibrissae)
Dermis contains sebaceous and sweat glands

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4
Q

What type of epithelium is present at the rear portion of the nasal cavity?

A

Pseudostratified ciliated columnar

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5
Q

What portion of the nose is responsible for the most anterior nosebleeds in the nose?

A

Keisselbach’s plexus (little’s area)

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6
Q

What mucosal cells are plentiful in the posterior nasal cavity?

A

Goblet cells

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7
Q

What cells make up the olfactory epithelium?

A

Bipolar cells
Sustentacular cells
Basal cells

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8
Q

What is the role of bowman’s gland?

A

Produce mucous to trap scent particles for the bipolar cells to sense

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9
Q

What is the role of sustentacular cells?

A

Support the bipolar cells

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10
Q

What is the role of basal cells?

A

Stem cells that become either bipolar or sustentacular cells

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11
Q

Where are the paranasal sinuses?

A

Ethmoid
Sphenoid
Frontal
Maxilla

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12
Q

What is the epithelium morphology of the oropharynx? The nasopharynx? The laryngeal pharynx?

A

Oropharynx: stratified squamous
Nasopharynx: Respiratory (pseutostratified ciliary columnar)
Laryngeal pharynx: Stratified squamous

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13
Q

Which portions of the trachea have elastic cartilage?

A

Epiglottis
Corniculate and cuneiform
Superior aspect of arytenoids

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14
Q

Which portions of the trachea have hyaline cartilage?

A

Thyroid
Cricoid
Inferior aspect of arytenoids

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15
Q

Is movement for cartilage in trachea moved by intrinsic or extrinsic skeletal muscle?

A

Both

16
Q

What are the superior and inferior surfaces of the epiglottis made of?

A

Superior: Stratified squamous
Inferior: Respiratory epithelium

17
Q

Is the superior or inferior vocal fold mobile?

A

Inferior

18
Q

What moves the inferior vocal fold?

A

Vocalis muscle and vocal ligament

19
Q

What type of epithelium does the superior vocal folds have? Inferior vocal folds?

A

Superior: Respiratory
Inferior: Stratified squamous

20
Q

What is the structure of cartilage in the trachea?

A

C shaped, open end facing posteriorly

21
Q

What muscle decreases luminal size of the trachea?

A

Trachealis

22
Q

What are the three layers to the trachea?

A

Mucosa
Submucosa
Adventitia

23
Q

What is the histology of the mucosal layer of the trachea?

A

Respiratory epithelium
Thick basement membrane
Lamina propria consisting of loose fibroelastic tissue

24
Q

What is the layer that separates the mucosa from the submucosa in the trachea?

A

Elastic lamina

25
Q

What are the three major cells of the respiratory epithelium in the trachea?

A

Pseudostratified ciliary epithelium
Goblet cells
Basal cells

26
Q

What does the submucosa consist of in the trachea?

A

Dense irregular connective tissue
Mucosal glands
Lymphoid elements

27
Q

What does the adventitia layer of the trachea consist of?

A

Fibroelastic tissue
Cartilage
(anchors trachea to esophagus)

28
Q

What trends are seen as you pass down the bronchial tree?

A

Decreasing cartilage, glands, cellular height

Increasing smooth muscle and elastic tissue

29
Q

What is the intrapulmonary bronchi cartilage like?

A

Not C-shaped, instead irregular

30
Q

What distinguishes bronchioles from bronchi?

A

No cartilage, abundant smooth muscle and elastic/connective tissue

31
Q

What is the role of club cells?

A

secretory granules that help break down toxins via P450
Produce surfactants
Divide and replenish epithelium

32
Q

What does the epithelium look like for terminal bronchioles?

A

Simple cuboidal and club cells

CRRAB II - Anatomy/Embryology/Histology (3 decks)

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