Green glands of crustaceans, Biology

Green Glands of Crustaceans

Crustaceans have a pair of renal organs, each of which consists of an internally closed end-sac with a labyrinth, a long coiled nephridial tubule and a bladder which opens into the excretory pore located at the base of either the antennae where it is called antennary glands or the maxillae where it is called maxillary glands.

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Figure: Structure of the renal organ and urine formation in the crayfish

The end-sac in many cases is green and hence the name, green gland. Marine forms have a shorter tubule than freshwater forms because the freshwater forms have an extra salt-reabsorbing segment in the tubule.

Posted Date: 1/16/2013 1:37:32 AM | Location : United States







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