Describe antennal gland or green glands for excretion in prawns with diagram? Kindly answer sir/mam?
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Palaemon excretory system contains a pair of kidneys called the antennary or green glands and a median sac called renal sac.
Antennary glands: The antennary glands are present in the coxae of the antennae. Each gland is small, and white in color. Each gland shows three parts.
1. End - sac.
2. Labyrinth, and
3. Bladder.
The green glands are supplied with blood by the antennary arteries. By ultrafiltration water and dissolved substances pass into the end-sacs. The filtrate passes into the labyrinth. By selective reabsorption the useful products are returned to blood in labyrinth. The urine is collected and it flows into the bladders. The excretory fluid also comes here from the renal sac. The urine is passed out through the ureters and renal apertures.
For the picture --
https://www.google.co.in/search?q=green+glands+for+excretion+in+prawn&prmd=ivn&source=lnms&tbm=isch&sa=X&ved=0ahUKEwiJvaWNjdTZAhVBKY8KHQa7Ax8Q_AUIESgB&biw=360&bih=560#
Antennary glands: The antennary glands are present in the coxae of the antennae. Each gland is small, and white in color. Each gland shows three parts.
1. End - sac.
2. Labyrinth, and
3. Bladder.
The green glands are supplied with blood by the antennary arteries. By ultrafiltration water and dissolved substances pass into the end-sacs. The filtrate passes into the labyrinth. By selective reabsorption the useful products are returned to blood in labyrinth. The urine is collected and it flows into the bladders. The excretory fluid also comes here from the renal sac. The urine is passed out through the ureters and renal apertures.
For the picture --
https://www.google.co.in/search?q=green+glands+for+excretion+in+prawn&prmd=ivn&source=lnms&tbm=isch&sa=X&ved=0ahUKEwiJvaWNjdTZAhVBKY8KHQa7Ax8Q_AUIESgB&biw=360&bih=560#
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