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Q148
(IAS/2007)
Science & Technology › Basic Science (Physics, Chemistry, Biology) › Human anatomy physiology
Answer Verified
Which one of the following is the correct sequence in the order of decreasing length of the three structural parts given below of small intestine in the human body?
Result
Your answer:
—
·
Correct:
D
Explanation
The ileum is the longest segment of the small intestine, followed by the jejunum, with the duodenum being the shortest. Textbook/anatomical sources give the duodenum as about 25 cm long, the jejunum roughly 2.5 m (about two‑fifths of the small intestine), and the ileum approximately 3–3.5 m (about three‑fifths) in length. Therefore, in order of decreasing length the segments are: Ileum → Jejunum → Duodenum, which corresponds to option 4 [2].
Sources
- [1] https://www.uomus.edu.iq/img/lectures21/WameedMUCLecture_2021_92652603.pdf
- [2] https://www.ncbi.nlm.nih.gov/books/NBK459366/
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