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Ileum, caecum and colon of rabbit, showing Appendix vermiformis on fully functional caecum The human vermiform appendix on the vestigial caecum. The appendix was once believed to be a vestige of a redundant organ that in ancestral species had digestive functions, much as it still does in extant species in which intestinal flora hydrolyze cellulose and similar indigestible plant materials. [10]
In humans, the vermiform appendix is sometimes called a vestigial structure as it has lost much of its ancestral digestive function.. Vestigiality is the retention, during the process of evolution, of genetically determined structures or attributes that have lost some or all of the ancestral function in a given species. [1]
"The vestigiality of the human vermiform appendix: A Modern Reappraisal"—evolutionary biology argument that the appendix is vestigial; Smith HF, Fisher RE, Everett ML, Thomas AD, Bollinger RR, Parker W (October 2009). "Comparative anatomy and phylogenetic distribution of the mammalian cecal appendix". Journal of Evolutionary Biology.
It being useful doesn't make it less vestigial. See the definition of vestigial found in the article and perhaps have a read of the, interesting, article Vermiform appendix. However minor or major the function, if it is not doing the original job it is vestigial. Skittle 23:57, 24 February 2008 (UTC)
CBS' TheLate Show With Stephen Colbertwill be on an unexpected hiatus this week, following an announcement from the host himself. Colbert took to Instagram's Threads service to share the news of ...
When the appendix, a “finger-shaped pouch that sticks out from the colon on the lower right side of the belly," bursts, infection spreads and requires immediate surgery, according to the Mayo ...
Scrotal ultrasonography of an 85-year-old man with hydrocele, making the appendix of the testicle clearly distinctive as a 4 mm outpouching at upper right in image. Doppler shows some blood flow. The appendix testis (or hydatid of Morgagni ) is a vestigial remnant of the Müllerian duct , present on the upper pole of the testis and attached to ...
The show returned in early October, but later that month, Colbert hosted one episode from his home after testing positive for COVID before the rest of the week’s shows were canceled.