Question

Bidder’s Canal is found in
A. Testis of frog
B. Ovary of frog
C. Kidney of frog
D. All of the above

Answer 1

Hint: Bidder canal is present in those types of animals that are carnivores and helps in conducting sperm through a sequence of vasa efferentia from the testis. Anura (frog) reproductive system comprises the testis, ovary, and kidney.

Complete Answer:
- In this particular question, we have to study the bidder’s canal that is present in the male frog (Anura). This canal is found longitudinally and in the middle region of the kidney of a male frog and it carries the sperms. It is very close to the testis of a frog so that it easily receives sperms from the testis through numerous vasa efferentia.
- So now we discuss the functions of the bidder canal, so the bidder canal is a significant organ of male frog, it plays a crucial role in the reproduction as well as in an excretory system of the frog. It has a very important function: it can transfer the sperms from vasa efferentia to water. Ten to twelve vasa efferentia is present in testis. This enters the kidney, bidder canal, and urogenital duct.
- Therefore, in a male frog, this bidder canal runs longitudinally in the middle part of the kidney. The main function of the male frog kidney is excreting excess water whereas, on the land, they also use their kidney to replace the water lost by the evaporation in the skin. There are major three excretory organs that develop in vertebrates.
- Those are pronephros, metanephros, and mesonephros, etc. The internal anatomy of the bidder canal is composed of connective tissues and blood vessels and its periphery (outer portion) consists of the cortex which contains follicles.

According to this explanation, we can say that the correct answer to this question is option C ‘Kidney of frog’.

Note: The bidder canal is a very important organ of the male reproductive system of frog (Anura). It facilitates the conduction of sperm from the testis to the water. This canal is present longitudinally in the middle part of the kidney of a male frog.