Jejunum:
The jejunum (/dʒɨˈdʒuːnəm/) is the middle section of the small intestine in most higher vertebrates, including mammals, reptiles, and birds.
en.wikipedia.org
空腸:
在消化系統的解剖學方面，空腸（Jejunum）是整條小腸的中間，在十二指腸和迴腸之間。
zh.wikipedia.org
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Jejunum空腸