Question 1

Why is the alimentary canal of a frog short?

Accepted Answer

Frogs are carnivores, so the length of the intestine is reduced. The alimentary canal runs from the buccal cavity through the pharynx, oesophagus, stomach, intestine and rectum, and finally opens outside through the cloaca.

Question 2

How many chambers does the frog heart have?

Accepted Answer

The frog heart has three chambers — two atria and one ventricle — and is covered by a membrane called the pericardium.

Question 3

How does a frog respire in water and on land?

Accepted Answer

In water the skin acts as the respiratory organ (cutaneous respiration). On land the buccal cavity, skin and lungs act as respiratory organs. During aestivation and hibernation, gaseous exchange takes place through the skin.

Question 4

What is the cloaca in a frog?

Accepted Answer

The cloaca is a small median chamber into which the rectum, the urinary bladder and the urinogenital ducts open. It passes faecal matter, urine and sperms to the exterior.

Frog Anatomy Lab — Dissect Rana tigrina in 3D

About this lab

Practice