explain digestive system of cockroach with figure .

Digestive System

• The alimentary canal is divided into:

  • Foregut

  • Midgut

  • Hindgut

• Foregut:

  • Is lined by a cuticle

  • Consists of a mouth which opens into the tubular pharynx, leading into the oesophagus, which further opens into a sac-like crop that stores the food

  • The crop leads to a gizzard (proventriculus). The gizzard helps in grinding food as it has an inner layer with six chitinous teeth.

• The junction of the foregut and midgut has rings of 6 to 8 blind tubules called hepatic or gastric caecae, which secrete digestive juices.

• The hindgut is broader than the midgut, and consists of:

  • Ileum

  • Colon

  • Rectum (opens out through the anus)