Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
10 Cards in this Set
- Front
- Back
|
Epithelium Type
|
Pseudostratified Columnar Ciliated Epithelium
*the respiratory system is evolutionarily derived from the digestive system, so we'll see a lot of goblet cells |
|
|
Respiratory System Track (8)
|
Nose --> Pharynx --> Larynx (vocal cords - strat. squam.) --> Trachea (cartilage disappears from bronchi when the tube gets to about 1 mm and turns into) --> Bronchioles (cuboidal epithelium, which abruptly ends and turns into) --> Alveolar Duct (simple sqamous - won't be able to see from this point on), which turns into the Alveolus or the Alveolar Sac (involved in gas exchange)
|
|
|
Trachea (top to bottom)
|
Made up of hyaline cartilage, mixed glands, pseudostratified columnar ciliated epithelium, lumen, and smooth muscle which connects the two ends (during a cough, this muscle contracts). Large blood vessels may surround the trachea
|
|
|
In the Epithelium of the Trachea
|
-Cilia line the top, which move mucus out of lungs
-Goblet cells are underneath hat, which secrete mucus -Random nuclei are underneath that |
|
|
Bronchi
|
- (hyaline) cartilage "chunks" surround it
-smooth muscle -still has mixed glands -epithelium goes from pseudostratified to simple columnar -has goblet cells and cilia within the epithelium -when the diameter goes down to about 1 mm, all the hyaline cartilage disappears and it turns into the Bronchiole |
|
|
Bronchiole
|
-few goblets
-no cartilage -no glands (might be able to see some) -columnar to cuboidal epithelium found here, NO CILIA -smooth muscle surrounds it |
|
|
Bronchiole structures (5)
|
-simple cuboidal cells lining it (NO CILIA) are called Clara cells (are clear - do not pick up much stain
-Terminal/Respiratory Bronchiole (b/c alveoli is present) -Alveoli - blood vessels surrounding it -Alveolar Duct (cuboidal stops abruptly here) -Alveolar Sac |
|
|
Alveolus
|
-Inside are Type II Pneumocytes, which secrete surfactant as do Clara cells. Surfactant is a mixture of phospholipids, is a detergent that decreases surface tension therefore allowing the lungs to expand. They have a nice round nucleus w/ good amount of cytoplasm
-On the outside are the Type I Pneumocytes, which are respiratory cells for oxygen and carbon dioxide exchange. |
|
|
Smoker's Lung
|
Will see a lot of black particles, which are sometimes called dust cells. Alveolar macrophages are also present on this slide.
|
|
|
Lung
|
-Within the alveoli of the lung, you want low surface tension
-The Connective Tissue and Mesothelium found on the lung is composed of the parietal pleura, pleural cavity, and visceral pleura. -The lung is expanded into the cavity b/c the CT and Mesothelium can remove air and liquid from the cavity -If your lining of lung gets stabbed (if hole is present), then the lung will collapse due to pressue. Lung collapse = Pneumothorax |
