What is called Coxal gland?

The coxal gland is a gland found in some arthropods, for collecting and excreting urine. They are found in all arachnids (with the exception of some Acari), and in other chelicerates, such as horseshoe crabs. The gland consists of an end sac (saccule), a long duct (labyrinth) and a terminal bladder (reservoir).

What are green glands?

Green glands are excretory organs of some arthropods like crustaceans. They are also called antennal glands because these glands are located near the base of larger antennae. Each gland has three parts end sac, labyrinth and bladder. The labyrinth is the proper excretory gland. Hence green glands help in excretion.

What is the other name of green gland?

Paired maxillary and antennal glands (also called green glands) are the principal excretory organs in crustaceans.

What is a green gland used for?

antennal gland (green gland) Either of a pair of ducts (coelomoducts) found in the third segment of a crustacean and opening to the exterior at the base of the second antenna. They function as osmoregulatory organs.

What is green gland in zoology?

Definition of green gland : one of a pair of large green glands in some crustaceans (such as crayfishes) that have an excretory function and open at the bases of the larger antennae.

Do mites have coxal glands?

Initially, the podocephalic gland complex in actinedid mites and, in particular, in the Parasitengonina, is composed of four gland pairs – three pairs of alveolar/acinar, functioning in saliva production, and one pair of tubular/coxal, functioning in osmoregulation (Alberti and Coons 1999).

Why is it called the green gland?

In many higher crustaceans the excretory glands are located in the head. They are called antennal glands or maxillary glands, depending on whether they open at the base of the antennae or at the maxillae. If the tubule adjacent to the excretory pore is green, the gland is called a green gland.

Where is Green gland found?

Hint: Green glands or the antennal glands are paired glands in prawns, shrimps, etc. They help in the elimination of ammonia waste from the body. They are one of the excretory organs seen in Arthropods. They have three distinct parts and are present in larger antennae of the organisms.

Is Coxal glands present in mites?

Trombidiform mites are characterized by the presence of several paired glands in the anterior body portion united by a common conducting duct (podocephalic canal). Apart from the acinous (salivary) glands the podocephalic system includes a pair of tubular coxal glands (CGs) responsible for osmoregulation.

Where are green glands found?

Why do crayfish have antennal glands?

They function as osmoregulatory organs. For example, in the antennal gland of the freshwater crayfish (Astacus), fluid is filtered from the blood into an end sac and passes through a tubular labyrinth, where ions are reabsorbed, to produce a hypotonic urine that passes via a renal tubule to the bladder.

Which animal has green glands?

Mollusks. Hint: Green glands or the antennal glands are paired glands in prawns, shrimps, etc. They help in the elimination of ammonia waste from the body. They are one of the excretory organs seen in Arthropods.

What is the function of the coxal gland?

Coxal gland. Coxal gland, in certain arthropods, one of a pair of excretory organs consisting of an end sac where initial urine is collected, a tubule where secretion and reabsorption may take place, and an excretory pore at the base (coxa) of one of the legs. Variations among the species include highly convoluted tubule sections,…

Where are coxal glands found in arthropods?

Coxal glands are tubular organs, each opening on the basal region (coxa) of a limb. Since arthropods are segmented animals, it is reasonable to suppose that the ancestral arthropod had a pair of such glands in every segment of the… arachnid: Excretion

What does cooxal mean?

Coxal glands are tubular organs, each opening on the basal region (coxa) of a limb. Learn More in these related Britannica articles: Coxal glands are tubular organs, each opening on the basal region (coxa) of a limb. …excretory organs occur in arachnids: coxal glands and Malpighian tubules.