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28 Cards in this Set
- Front
- Back
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Teriary (segmental) bronchi
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Are 10 per lung; each penetrates a bronchopulmonary segment of the lung
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Terminal bronchioles
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Teriary bronchi branch to form?
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trachea to terminal bronchioles
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The "brachial tree" runs from?
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Decrease
Cartilage plates |
Cartilage rings ___________ in size to become __________
(structural change in bronchioles) |
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Smooth
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______ muscles replace cartilage
(structural change in brinchioles) |
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Simple cuboital
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Pseudostratified columnar cells change to ____________ (stuctural change in bronchioles)
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True
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True or False; Bronchioles have smooth muscle and no cartilage
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Lobules; each one recieves a terminal bronchiole
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Bronchopulmonary segments are composed of ___________
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Lobules
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Bronchiopulmonary segments; note- terminal and respiratory bronchioles and air sacs belong to a lobule
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Characteristics of lobule
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Elastic connecive tissue
Lymphatic vessel Arteriole Venule Branch a terminal bronchiole; divide to form respiratory bronchioles |
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Respiratory bronchioles
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Derived from terminal bronchioles
Divides to form several alveolar ducts |
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Alveolar ducts (atria)
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Derived from respiratory bronchioles
Consists of: Alveolus Alveolar sacs |
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Alveolus
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A single cup-like strucutre; has an elastic basement membrane
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Alveolar sac
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A number of aveoli (2 or more) that share a common opening
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Alveolar wall composed of:
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- Type I alveolar cells (squamous pulminary epithelial)
-Type II Alveolar (septal)cells -Alveolar macrophages |
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Teriary (segmental) bronchi
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Are 10 per lung; each penetrates a bronchopulmonary segment of the lung
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Terminal bronchioles
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Teriary bronchi branch to form?
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trachea to terminal bronchioles
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The "brachial tree" runs from?
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Decrease
Cartilage plates |
Cartilage rings ___________ in size to become __________
(structural change in bronchioles) |
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Smooth
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______ muscles replace cartilage
(structural change in brinchioles) |
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Simple cuboital
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Pseudostratified columnar cells change to ____________ (stuctural change in bronchioles)
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Type I alveolar (squamous pulmonary epithelial) cells
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Most gaseous exchange occurs here
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Type II alveolar (septal) cells
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Secretes alveolar fluid -moistens cells; also secretes surfacactant
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Surfactant
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Reduces surface tension of alveolar fluid and reduces chance of alveolar collapse.
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Alveolar macrophages
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dust cells
are wandering phagocytes |
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Alveolar-Capillary (respiratory) membrane
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wall btwn cappilary membrane and wall of alveolar sac
-Alveolar wall -Basment membrane of alveolar wall -Basement membrane of capillary wall -Endothelium of capillary wall |
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Respiratory center
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consists of a widely dispersed group of neurons functionally divided into 3 areas within the Brain Stem:
-Medullary rhythmicity area in medulla -Apenutsitc area in pons -pueumontaxic are in pons |
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Fibroblasts
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_________ are also present that produce reticular and elastic fibers.
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