Chapter 7: Structural Organisation in Animals

Class 11 Biology Chapter 7 Structural Organisation in Animals Exercise Questions and Answers :

1. Draw a neat diagram of digestive system of frog.

Answer : The digestive system of a frog consists of an alimentary canal and digestive glands. The alimentary canal is relatively short due to the carnivorous diet of frogs. It begins with the mouth leading to the buccal cavity, pharynx, and esophagus, which connects to the stomach. The stomach, in turn, leads to the intestine, rectum, and exits through the cloaca. The liver produces bile stored in the gall bladder, and the pancreas secretes digestive enzymes in pancreatic juice. Digestion primarily occurs in the stomach with the help of HCl and gastric juices. The partially digested food, known as chyme, enters the duodenum, where it combines with bile and pancreatic juices for further digestion. The final absorption of nutrients takes place in the intestine through villi and microvilli. Undigested waste exits through the cloaca.

2. Mention the function of the Ureters in frog . 

Answer :  The function of the ureters in frogs are :

(i) Transport urine: Ureters carry urine from the kidneys to the cloaca in both male and female frogs.

(ii) Serve as urinogenital duct (in males): In males, the ureters also function as the ducts for both urine and reproductive materials, opening into the cloaca.

(iii) Aid in waste elimination: Ureters play a crucial role in excreting waste, as frogs eliminate urea through their excretory system.