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| Bronchus |
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| Trachea |
Trachea vs. Bronchus
- remember that the trachea will have c-shaped cartilage rings while the bronchus will have cartilage that looks 'broken' - it will only have small pieces.
- also, the trachea has large subtracheal glands that are sandwiched between the cartilage and epithelium, but the bronchus does not.
- both have ciliated pseudostratified columnar epithelium
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| Epidermis |
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| Esophagus |
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| Vagina |
Epidermis vs. Esophagus vs. Vagina
- all three of these have stratified squamous epithelium, so telling them apart can be tricky
- the epidermis is the only one of the three that will have it's darkest layer in the middle. Notice how in both the vagina and the esophagus, the darkest layer is the deepest layer. The stratum granulosum is the darkest layer of the epidermis and is located right in the middle of all the layers (remember 'can loud girls sing bass'!).
- the esophagus is unique because it is the only one of the three that has glands in the submucosa beneath the epithelium. If we ever show you the esophagus we will include the subesophageal glands with the epithelium.
- the vagina has two unique features: it is the only one of the three with glands in the epithelium itself, and it is the only one with cells that store large amounts of glycogen. Note the lighter staining and slight bulging of the more superficial cells - this is due to abundant glycogen storage.
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| Urethra |
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| Ureter |
Ureter vs. Urethra
- these two are extremely similar: they both have transitional epithelium and both perform almost the same function. The only difference is the shape of the lumen.
- the ureter has a Greek cross-shaped lumen; usually much smaller and less branched
- the urethra is larger and therefore has a larger lumen that tends to have more branches
Hope this helps!!!!
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