Question

Which type of kidney is found in amphibian (frog)?

• A. Holonephric
• B. Mesonephric
• C. Pronephric
• D. Metanephric

Answer 1

Answer: (B)

Mesonephric

The function of a kidney is to excrete waste and excess water. While on land apart from excreting waste, amphibians (frogs) also use their kidneys to replace water lost through evaporation in the skin. There are three excretory organs that develop in vertebrates. These are pronephros, mesonephros and metanephros.

Pronephros are the basic type of excretory organs which corresponds to the first stage of kidney development. The functional kidney of a frog tadpole is pronephros developed from nephrotomes in the anterior regions.

Pronephros is succeeded by the mesonephros. It is the main excretory organ of aquatic vertebrates such as fish and amphibians and as a temporary kidney in reptiles, birds, and mammals.The mesonephros acts as a structure similar to the kidney. The functional kidney of frog is mesonephros.

Metanephros is the third type of embryonic excretory organs found in higher vertebrates. These are the permanent and functional kidney.

Thus, the correct answer is option B.