The oviduct ampulla and isthmus were composed of mucouslayer, tunica muscularis and adventitia.
壶腹部和峡部均由黏膜层、肌层和外膜构成。
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When the researchers dissected these now susceptible mice, they discovered that the mucouslayer that typically lines the gut was only half as thick as in protected mice.
The stomach has a relatively large epithelial surface, but because it has a thick mucouslayer and the time that the drug remains there is usually relatively short, absorption is limited.