The shark possesses behind each eye an accessory respiratory organ called a spiracle.
In Rhinelepis and Pseudorinelepis, the diverticulum functions as an accessory respiratory organ.
The mouth, also called the oral cavity or buccal cavity, is the entranceway into the digestive system containing both primary and accessory organs of digestion.
A closely related term is "accessory digestive organ".
About half of these fluids are secreted by the salivary glands, pancreas, and liver, which compose the accessory organs and glands of the digestive system.
Some of these enzymes are secreted by accessory digestive organs, while others are secreted by the epithelial cells of the stomach and intestine.
Loricariid catfishes have evolved several modifications of the digestive tract that function as accessory respiratory organs or hydrostatic organs.
There is only an accessory organ for the copulation.
These gas structures can be used for buoyancy, as an accessory respiratory organ, or both.
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