Describe the excretory system of a frog.

(N/A) $\rightarrow$ The elimination of nitrogenous wastes is called excretion. These wastes are removed by a well-developed excretory system.
$\rightarrow$ The excretory system consists of a pair of kidneys,ureters,cloaca,and urinary bladder.
$\rightarrow$ Kidney: These are compact,dark red,and bean-shaped structures situated posteriorly in the body cavity on both sides of the vertebral column.
$\rightarrow$ Each kidney is composed of several structural and functional units called uriniferous tubules or nephrons.
$\rightarrow$ The ureters act as urinogenital ducts in males,which open into the cloaca.
$\rightarrow$ Urinary bladder: $A$ thin-walled urinary bladder is present ventral to the rectum,which also opens into the cloaca.
$\rightarrow$ Excretory wastes are carried by the blood into the kidney,where they are filtered and excreted.