Question

The digestive system of frogs is made of the following parts. Arrange them in an order beginning from the mouth. Mouth, oesophagus, buccal cavity, stomach, intestine, cloaca, rectum,cloacal aperture.

Answer 1

Mouth:

The digestive system of frogs begins from the mouth and ends at the cloaca.
Mouth is an opening which leads into the oral cavity or buccal cavity.

Buccal cavity:

The roof of the buccal cavity consists of teeth not used for mastication as the prey is swallowed whole. It has a large bilobed muscular tongue which is free behind and fixed in the front. The buccal cavity leads to the oesophagus or food pipe.

Oesophagus:

Short muscular tube that leads into the stomach.

Stomach:

Stomach is wide and slightly curved, contains the gastric glands that help in digestion of proteins.

Intestine:

The first part of the intestine is duodenum and then ileum. The ileum has many folds on the inner surface to increase the area for absorption.

Rectum:

The ileum leads to the rectum.

Cloaca:

The last part of the rectum is cloaca where undigested food is present.

Cloacal aperture:

The aperture of the cloaca that opens to the outside of the body is called cloacal aperture.

Final answer:

Mouth$\to$ Buccal cavity$\to$Oesophagus$\to$ Stomach$\to$ Intestine$\to$ Rectum$\to$ Cloaca$\to$ Cloacal aperture.