Appendix

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• In book design, an appendix is a reference section at the end of a book (see Addendum#Books
  Addendum
  
  In the plural, both the Latin addenda and the English language adaptation addendums are acceptable....
  )
• In anatomy
  Organ (anatomy)
  
  In biology, an organ is a biological tissue that performs a specific function or group of functions. Usually there is a main tissue and sporadic tissues....
  , a section at the end of an organ; in particular the:
• Vermiform appendix
  Vermiform appendix
  
  In human anatomy, the appendix is a blind ended tube connected to the cecum , from which it develops embryologically. The cecum is a pouch-like structure of the Colon ....
   (often referred to as simply the "appendix"), a part of the human digestive system.
• Right auricular appendix
  Right auricular appendix
  
  Quincy Lavell Lewis is an United States professional basketball player. He currently plays with the pro club CB Bilbao Berri in Spain....
  , a conical pouch on the right atrium of the heart.
• Left auricular appendix
  Left auricular appendix
  
  The left atrial appendage is a muscular pouch connected to the left atrium of the heart.It has a distinct embryologic origin....
  , a conical pouch on the left atrium of the heart.
• Appendix of the epididymis
  Appendix of the epididymis
  
  On the head of the epididymis is a small stalked appendage . It is named the appendix of the epididymis , and is usually regarded as a detached Efferent ducts....
  , a detached efferent duct of the epididymis.
• Appendix testis
  Appendix testis
  
  The appendix testis is a vestigial remnant of the M?llerian duct, present on the upper pole of the testis and attached to the tunica vaginalis....
  , a vestigial remnant of the Müllerian duct.
• Epiploic appendix
  Epiploic appendix
  
  The epiploic appendices are small pouches of the peritoneum filled with fat and situated along the colon and upper part of the rectum.They are chiefly appended to the transverse and sigmoid parts of the colon, however, their function is unknown....
  , one of several small pouches of fat on the peritoneum along the colon and rectum.
• Fibrous appendix of the liver, a band on the left of the liver
  Liver
  
  The liver is a vital organ present in vertebrates and some other animals; it has a wide range of functions, a few of which are detoxification, protein synthesis, and production of biochemicals necessary for digestion....
  .
• Appendix of the laryngeal ventricle
  Appendix of the laryngeal ventricle
  
  The appendix of the laryngeal ventricle is a diverticulum which extends vertically from the ventricle of the larynx. It runs between the vestibular fold, thyroarytenoid muscle, and thyroid cartilage, and is conical, bending slightly backward....
  , a sac that extends from the laryngeal ventricle.
• Mesoappendix
  Mesoappendix
  
  The mesoappendix is the portion of the mesentery connecting the ileum to the Vermiform appendix. It may extend to the tip of the appendix. It encloses the appendicular artery and vein, as well as lymphatic vessels, nerves, and often a lymph node....
  , the portion of the mesentery
  Mesentery
  
  In anatomy, the mesentery is the double layer of peritoneum that suspends the jejunum and ileum from the posterior wall of the abdomen. Its meaning, however, is frequently extended to include double layers of peritoneum connecting various components of the abdominal cavity....
   that connects the ileum
  Ileum
  
  The ileum is the final section of the small intestine in most higher vertebrates, including mammals, reptiles, and birds. In fish, the divisions of the small intestine are not as clear and the terms posterior intestine or distal intestine may be used instead of ileum....
   to the vermiform appendix.
• In law, an appendix is an addition or addendum to a contract; see Addendum#Contracts
  Addendum
  
  In the plural, both the Latin addenda and the English language adaptation addendums are acceptable....
  

See also

• irregular English plurals
  English plural
  
  In the English language, nouns are inflection for grammatical number?that is, Grammatical number or plural. This article discusses the variety of ways in which English plurals are formed....
   — the word "appendix" has irregular plural forms (appendixes vs. appendices)