Structural Organisation in Animals Test 10

The copulatory pads of the male frog are present on the first digit of the forelimbs. Frogs show sexual dimorphism and the presence of copulatory pads in male frogs is a distinguishing feature of the two sexes.

Frogs are carnivores. This means that their diets consist of food material which are solely animal in origin. Frogs normally feed on insects such ad flies, mosquitoes, dragonflies and worms.

Frogs are carnivorous. This means that their diet consists of food which is purely of animal origin. For this reason, the length of its intestine is reduced. Thus, frogs have a short alimentary canal.

The liver is the organ responsible for the secretion of bile. The secreted bile is stored in the gall bladder. Bile is a greenish-yellow fluid that acts as an emulsifying agent for the catabolic breakdown of fats.

Bile is stored in the gall bladder of the frog after it has been secreted by the liver. Bile is a greenish-yellow fluid that emulsifies fats. Bidder’s canal is a part of the male reproductive system of frogs.

Rana tigrina or frog possesses a bilobed tongue to capture food. It has webbed feet for the purpose of swimming in water. It also has a membranous tympanum to receive sound signals. It has moist, slippery skin.

Duodenum is the first part of the small intestine. Food ingested by the frog is churned with bile, pancreatic juices and hydrochloric acid in the stomach to form an acidic mixture called chyme. This is passed to the duodenum.

Pancreatic juice is first delivered from the pancreas to the common bile duct via the pancreatic duct. The common bile duct, which also receives bile from the gall bladder delivers its contents into the duodenum.

Final digestion in frogs takes place in the intestine where pancreatic juices break down proteins and carbohydrates and bile break down fat. The undigested food moves to the rectum end exits through the cloaca.

The undigested food in frogs is passed out through the cloaca. The rectum lies before the cloaca. The undigested food is digested completely in the intestine and passed into the cloaca via the rectum.