Lab7 - Respiratory System Flashcards

1
Q

What are the 3 zones of the respiratory system?

A
  1. Conducting Zone:
    - Nasal cavity, Larynx Trachea, Bronchi, Regular Bronchioles, Terminal Bronchiole
    - Cleans, warms, moistens air
    - Cartilage and smooth muscle
    - No gas exchange
  2. Transitional Zone:
    - Only respiratory bronchioles
    - smooth muscle, NO cartilage
    - Some gas exchange
  3. Respiratory Zone:
    - Alveolar ducts, alveolar sacs, alveoli
    - No cartilage, little smooth muscles
    - GAS EXCHANGE
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2
Q

How is the typical respiratory epithelium classified?

A

Pseudostratified columnar ciliated epithelium with Goblet cells

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3
Q

What are the layers of tissue lining the trachea?

A

Mucosa: Resp epithelium + Lamina propria (loose CT)
Submucosa: Dense irregular CT, glands (serous and mucous), C-ring of Hyaline Cartilage, Trachealis muscle + other smooth muscle
Aventitia: Dense irregular CT

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4
Q

What are the layers of tissue lining the Intrapulmonary Bronchus like?

A

Mucosa:
- Wavy resp. epithelium
- Fewer goblet cells
- LP is highly vascularized
Submucosa:
- Plates of hyalin cartilage (no C-rings)
- Smooth muscle, Dense irregular CT, S and M glands
Adentitia:
- Dense irregular CT mixed with lung tissue (intrapulmonary)

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5
Q

What are the layer of the tissue lining the regular bronchioles like?

A

Mucosa:
- Simple ciliated columnar epithelium
- NO goblet cells
- Wavy epithelium from contraction of smooth muscle
- Thin lamina propria

Submucosa:
- Lots of smooth muscles (2 layers)
- NO cartilage or glands

Adventitia:
- Hard to distinguish, Very thin and mixed with lung

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6
Q

What are the layers of tissue lining the Terminal Bronchiole like?

A

Mucosa:
- Continuous layer of simple ciliated cuboidal cells + non-ciliated cuboidal cells (CLUB cells)
- less wavy (bc less smooth muscles)
- Lamina Propria nearly absent

Submucosa:
- Little smooth muscle, wall is intact, no cartilage, no glands

Adentitia → Can’t distinguish

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