Also found in: Dictionary, Thesaurus, Legal, Encyclopedia.
Related to accessory organ: submucosa
an organ or other distinct collection of tissues that contributes to the function of another similar organ, such as the ocular muscles and eyelids, which contribute to the function of the eye.
accessory organAn organ or structure that assists the functionality of other organs in a system.
Teeth, tongue, salivary glands, gallbladder, liver, pancreas.
An organ that has a subordinate function.
See also: organ
A lump of tissue adjacent to an organ that is similar to it, but which serves no important purpose, if functional at all. While not necessarily harmful, such organs can cause problems if they grow too large or become cancerous. In any case, their presence points to an underlying abnormality in the parent organ.
Mentioned in: Abdominal Ultrasound