Histo Lab 2 Flashcards

1
Q

What type of epithelium is in the mammalian trachea

A

Pseudostratified ciliated columnar

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2
Q

Are there submucosal glands in mammalian trachea

A

Only in large animals

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3
Q

Differences between avian and mammalian trachea

A

Avian has 2 layers of complete cartilage ring
Avian has submucosal glands (saccular)

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4
Q

What is distinct in bronchus vs bronchioles

A

Bronchus has cartilage plates and bronchioles lack cartilage

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5
Q

In smaller bronchi what disappears

A

Glands disappear in smaller bronchi and cartilage is decreased

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6
Q

Primary and secondary bronchioles epithelium

A

Ciliated columnar

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7
Q

Terminal and respiratory bronchioles epithelium

A

Cuboidal, rarely ciliated

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8
Q

Alveolar ducts connect what 2 structures

A

Alveolar ducts connect respiratory bronchioles to alveolar sacs

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9
Q

Components of avian lungs (6)

A

Trachea, primary and secondary bronchioles, parabronchi, atria, air capillaries, air sacs

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10
Q

What participates in gas exchange in avians

A

Parabronchi NOT air sacs

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11
Q

When the bird exhales, what happens to air sacs

A

Air sacs collapse and release air to trachea

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12
Q

Subdivisions of avian parabronchi wall

A

Atria

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13
Q

Epithelium in atria of avian

A

Cuboidal or squamou’s epithelium

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14
Q

Air capillaries epithelium and function

A

Air capillaries b’ring air to atria and are lines by simple squamous epithelium

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15
Q

What is in the walls of the parabronchi

A

Smooth muscle

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