Question

Enlist different organs of the foregut of a cockroach.

Answer 1

Hint: In the cockroach, the food canal is made of foregut, midgut, and hindgut. Foregut has the following components:
1. The Mouth
2. Pharynx
3. Crop or oesophagus
4. Gizzard
5. Pair of Salivary glands

Complete answer:
The mouth- These mouthparts allow the cockroach to bite and chew on the hard stuff, eat soft stuff, and lap on fluids as well. Labrum, Mandibles, and a pair of first maxillae, labium, and hypopharynx are also included in the mouth sections. The arrangement of each of the mouth elements, Labrum, is as follows: the labrum covers the mouth.
Pharynx- A well-muscular organ called the Pharynx is present behind the mouth, forcing the food into the oesophagus. In sap feeders, the pharynx serves as a sucking pump. A narrow tube that conducts food into crops is the oesophagus. Teeth, like grinding and straining food in a cockroach.
Crop or oesophagus- The oesophagus is a thin, narrow tabular structure followed by a large structure known as a seed, similar to a large sac. The crop is a food supply storage pocket. Crucial point: ... Gizzard is a thin, rounded thick-walled lining structure with muscular chitins.
Gizzard- In the oesophagus, the food enters and then into the seed. ... The food is then transmitted to the Gizzard, which serves as a chamber for grinding. Gast caeca-secreted digestive enzymes act on the food in the stomach.
Pair of salivary glands- The salivary cockroach gland consists of secretory acini with central protein-producing cells and peripheral ion-transporting cells, an extensive duct system, and a pair of reservoirs. Serotonergic and dopaminergic innervation regulates salivation.

Note: The foregut opens into a void, where it temporarily stores undigested food. The mouth opens into a short tubular pharynx that leads to the oesophagus, a narrow tubular passage. Bacteria that the cockroach uses to digest its food are found in the gastric sacks.