Question

In cockroach, identify the parts of the foregut in correct sequence :-

• A. Mouth $\to$ Oesophagus $\to$ Pharynx $\to$ Crop $\to$ Gizzard
• B. Mouth $\to$ Crop $\to$ Pharynx $\to$ Oesophagus $\to$ Gizzard
• C. Mouth $\to$ Gizzard $\to$ Crop $\to$ Pharynx $\to$ Oesophagus
• D. Mouth $\to$ Pharynx $\to$ Oesophagus $\to$ Crop $\to$ Gizzard

Answer 1

The correct option is D Mouth $\to$ Pharynx $\to$ Oesophagus $\to$ Crop $\to$ Gizzard

The alimentary canal of the cockroach is divided into three regions: foregut, midgut and hindgut.

The foregut starts with the mouth which opens into the pharynx. Pharynx is followed by oesophagus.

Oesophagus opens into a wide sac for storing food known as crop. Crop leads into gizzard.

Hence, the parts of the foregut in correct sequence are:

Mouth $\to$ Pharynx $\to$ Oesophagus $\to$ Crop $\to$ Gizzard

Fig: Alimentary canal of cockroach