energy is stored by tightening the flexor muscles against the extensors. this is called the catapault mechinism. it is also used by human sprinters as they place tension against the starting block.
liver
Toads have a developed Bidder's organ, frogs have a degenerated organ wich will not be functional.
Fat cells.
In frogs, the organ located directly above the middle part of the liver is the gallbladder. The gallbladder stores bile produced by the liver, which aids in the digestion of fats. It is typically a small, greenish sac situated beneath the liver.
Frogs have a crop and a gizzard. A frog also has a organ called a polci.
The gallbladder.
The spleen is the organ found within the mesentery that stores blood in a frog. It acts as a reservoir for blood and also plays a role in immune function by filtering the blood and removing old or damaged red blood cells.
Intestines are present underneath frogs stomach i.e on the posterior side of the body.
The bladder. It stores urine.
I know that weed killer Deforms The sex organs in frogs, but I'm not sure what produces it.
Gall Bladder
I think it's the liver