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The human appendix averages 9 cm (3.5 in) in length, ranging from 5 to 35 cm (2.0 to 13.8 in). The diameter of the appendix is 6 mm (0.24 in), and more than 6 mm (0.24 in) is considered a thickened or inflamed appendix.
[1] [2] It descends behind the termination of the ileum and enters the mesoappendix of the vermiform appendix. It runs near the free margin of the mesoappendix and ends in branches which supply the appendix. Micrograph of entry point of appendicular arteries (arrows at level of inner muscular layer), not to be confused with a perforation.
The appendix has a mucosa resembling the colon but is heavily infiltrated with lymphocytes. Transition between the different types of epithelium occurs at the junction between the oesophagus and stomach ; between the stomach and duodenum , between the ileum and caecum , and at the pectinate line of the anus .
It also includes the appendix, which is attached to the cecum. Its length is about 1.5 m, and the area of the mucosa in an adult human is about 2 m 2 (22 sq ft). [19] The longest part of the large intestine is the colon whose main function is to absorb water and salts. [21] The large intestine begins at the cecum, where the appendix is located
Infection of the appendix is appendicitis. When there is a buildup of bacteria, the appendix can get inflamed and swollen, and this leads to appendicitis. Pancreatitis is the inflammation of the pancreas. Acute pancreatitis is sudden inflammation of the pancreas that may be mild or life-threatening but usually subsides. Gallstones and excessive ...
Location of the appendix in the digestive system 3D model of appendicitis. Acute appendicitis seems to be the result of a primary obstruction of the appendix. [20] [10] Once this obstruction occurs, the appendix becomes filled with mucus and swells. This continued production of mucus leads to increased pressures within the lumen and the walls ...
In the large intestine, [2] the passage of the digesting food in the colon is a lot slower, taking from 30 to 40 hours until it is removed by defecation. [31] The colon mainly serves as a site for the fermentation of digestible matter by the gut flora. The time taken varies considerably between individuals.
Gross anatomy (also called topographical anatomy, regional anatomy, or anthropotomy) is the study of anatomical structures that can be seen by the naked eye. [1] Microscopic anatomy is the study of minute anatomical structures assisted with microscopes , which includes histology (the study of the organization of tissues), [ 1 ] and cytology ...