|
|
|
|
|
Bidder's OrganBidder's organ is a spherical, brownish reproductive organ in any male member of the family Bufonidae, or simply, toads. It is located just in front of the kidney. It is a rudimentary ovary, being formed at the anterior tip of the testis during its larval stage. In inactivation, it contains miniature follicles which have the capability to mature. Zoologists have experimented with the physiology of the organ by castrating the male toad of its testis. Doing so, the Bidder's organ takes over the function of the testis, enlarge, and produce viable oocytes, that is, egg cells. The Bidder's Organ's similarity with the sex-changing features of fishes and reptiles are still being under experimentation, although some scholars do not link the bidder's organ with the latter two. Location of the Bidder's Organ The most ideal specimen for dissection is Bufo marinus, or Giant Toad. In the male toad, after opening the abdomen, cut the intestine in the cloacal region. After cutting it, lift up the intestine (appearing as a coiled and reddish). You will see the Bidder's organ just between the two whitish and elongated kidney, or, nephros. You can distinguish between the testis (which has the same shape and color), by looking at the kidneys. The testes are located just above the kidney aices and at the end of the filamentous, yellow bodies named corpora adiposa (fat bodies). The testes also occurs in pair, while the Bidder's organ is only single, and is bound to the body by the mesentery.
|
 |
|
| Copyright 2005-2009 OnPedia.com. All Rights Reserved |
|
|