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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]
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]
The appendix, long misunderstood as a vestigial organ, is now recognized as a key MALT structure, playing an essential role in B-lymphocyte-mediated immune responses, hosting extrathymically derived T-lymphocytes, regulating pathogens through its lymphatic vessels, and potentially producing early defenses against diseases. [1]
Appendicitis is one of the most frequent diagnoses for emergency department visits resulting in hospitalization among children ages 5–17 years in the United States. [108] Adults presenting to the emergency department with a known family history of appendicitis are more likely to have this disease than those without. [109]
(Reuters) - Philanthropist and former media tycoon Ted Turner was rushed to hospital with appendicitis early on Friday in Argentina's Patagonia region, where we he owns property, local media said.
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 chronic disease — which affects the central nervous system, including the brain, spinal cord and optic nerves — would eventually lead Vieira to step aside from her career in broadcast ...
An Ohio couple who tortured their five adopted sons in “dungeon”-like conditions and deprived them of food and water, among other abuses, has been sentenced after taking a plea deal.