Alveolar ducts
Respiratory bronchioles continue as alveolar ducts, elongated passageways whose walls consist almost entirely of alveoli. The opening of each alveolus is surrounded by a ring of smooth that appears like a “knob” in section. Alveolar ducts terminate as alveolar sacs, blind-ended pouches composed of clustered alveoli. 40x
Terminal bronchiole
Respiratory bronchioles continue as alveolar ducts, elongated passageways whose walls consist almost entirely of alveoli. The opening of each alveolus is surrounded by a ring of smooth that appears like a “knob” in section. Alveolar ducts terminate as alveolar sacs, blind-ended pouches composed of clustered alveoli. 40x
Respiratory bronchiole
Respiratory bronchioles continue as alveolar ducts, elongated passageways whose walls consist almost entirely of alveoli. The opening of each alveolus is surrounded by a ring of smooth that appears like a “knob” in section. Alveolar ducts terminate as alveolar sacs, blind-ended pouches composed of clustered alveoli. 40x
Alveolar ducts
Respiratory bronchioles continue as alveolar ducts, elongated passageways whose walls consist almost entirely of alveoli. The opening of each alveolus is surrounded by a ring of smooth that appears like a “knob” in section. Alveolar ducts terminate as alveolar sacs, blind-ended pouches composed of clustered alveoli. 40x
- Alveoli
Respiratory bronchioles continue as alveolar ducts, elongated passageways whose walls consist almost entirely of alveoli. The opening of each alveolus is surrounded by a ring of smooth that appears like a “knob” in section. Alveolar ducts terminate as alveolar sacs, blind-ended pouches composed of clustered alveoli. 40x
- Knobs
Respiratory bronchioles continue as alveolar ducts, elongated passageways whose walls consist almost entirely of alveoli. The opening of each alveolus is surrounded by a ring of smooth that appears like a “knob” in section. Alveolar ducts terminate as alveolar sacs, blind-ended pouches composed of clustered alveoli. 40x
Alveolar sacs
Respiratory bronchioles continue as alveolar ducts, elongated passageways whose walls consist almost entirely of alveoli. The opening of each alveolus is surrounded by a ring of smooth that appears like a “knob” in section. Alveolar ducts terminate as alveolar sacs, blind-ended pouches composed of clustered alveoli. 40x
Image source >
This image was taken of a slide in the Loyola University collection.
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