Digestive system of Cockroach MCQ - Practice Questions with Answers

Digestive system of Cockroach

• Digestive system consists of alimentary canal which is divided into three regions i.e. foregut, midgut and hindgut.

Foregut

• Foregut includes buccal chamber having mouth on one side and pharynx on the another.
• It also includes oesophagus, crop and gizzard. 
• The mouth opens into a short pharynx, leading to a narrow tubular passage called oesophagus.
• Oesophagus opens into a sac-like structure called crop.
• Crop is the largest part of foregut and its function is to store the food.
• The crop is followed by gizzard or proventriculus. It is small, cone-shaped and muscular.
• Gizzard possess thick inner cuticle in the form of six highly chitinous plates called teeth.
• The major function of gizzard is to grind the food particles.
• The entire foregut is lined by cuticle.
• The junction of foregut and midgut consists of a ring of 6-8 blind tubules called hepatic or gastric caeca. 
• The function of hepatic caeca is secretion of digestive juices.

Midgut

• It is the portion between hepatic caceca (anterior) and Malpighian tubule (posterior). 
• Midgut forms the true stomach and is responsible for digestion and absorption. 

Hindgut

• Hindgut is broader than the midgut
• Hindgut is differentiated into ileum, colon and rectum
• The rectum opens out through the anus 

Salivary glands

• These are the chief digestive glands of cockroach
• They are paired structures that lie on each side of oesophagus and crop.
• These secrete saliva which contains mucus, amylase, chitinase and cellulase
   

Digestive system of Cockroach

• Digestive system consists of alimentary canal which is divided into three regions i.e. foregut, midgut and hindgut.

Foregut

• Foregut includes buccal chamber having mouth on one side and pharynx on the another.
• It also includes oesophagus, crop and gizzard. 
• The mouth opens into a short pharynx, leading to a narrow tubular passage called oesophagus.
• Oesophagus opens into a sac-like structure called crop.
• Crop is the largest part of foregut and its function is to store the food.
• The crop is followed by gizzard or proventriculus. It is small, cone-shaped and muscular.
• Gizzard possess thick inner cuticle in the form of six highly chitinous plates called teeth.
• The major function of gizzard is to grind the food particles.
• The entire foregut is lined by cuticle.
• The junction of foregut and midgut consists of a ring of 6-8 blind tubules called hepatic or gastric caeca. 
• The function of hepatic caeca is secretion of digestive juices.

Midgut

• It is the portion between hepatic caceca (anterior) and Malpighian tubule (posterior). 
• Midgut forms the true stomach and is responsible for digestion and absorption. 

Hindgut

• Hindgut is broader than the midgut
• Hindgut is differentiated into ileum, colon and rectum
• The rectum opens out through the anus 

Salivary glands

• These are the chief digestive glands of cockroach
• They are paired structures that lie on each side of oesophagus and crop.
• These secrete saliva which contains mucus, amylase, chitinase and cellulase
   

Digestive system of Cockroach

• Digestive system consists of alimentary canal which is divided into three regions i.e. foregut, midgut and hindgut.

Foregut

• Foregut includes buccal chamber having mouth on one side and pharynx on the another.
• It also includes oesophagus, crop and gizzard. 
• The mouth opens into a short pharynx, leading to a narrow tubular passage called oesophagus.
• Oesophagus opens into a sac-like structure called crop.
• Crop is the largest part of foregut and its function is to store the food.
• The crop is followed by gizzard or proventriculus. It is small, cone-shaped and muscular.
• Gizzard possess thick inner cuticle in the form of six highly chitinous plates called teeth.
• The major function of gizzard is to grind the food particles.
• The entire foregut is lined by cuticle.
• The junction of foregut and midgut consists of a ring of 6-8 blind tubules called hepatic or gastric caeca. 
• The function of hepatic caeca is secretion of digestive juices.

Midgut

• It is the portion between hepatic caceca (anterior) and Malpighian tubule (posterior). 
• Midgut forms the true stomach and is responsible for digestion and absorption. 

Hindgut

• Hindgut is broader than the midgut
• Hindgut is differentiated into ileum, colon and rectum
• The rectum opens out through the anus 

Salivary glands

• These are the chief digestive glands of cockroach
• They are paired structures that lie on each side of oesophagus and crop.
• These secrete saliva which contains mucus, amylase, chitinase and cellulase