digestive structure of a cockroach
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The alimentary canal starts with the foregut which comprises the mouth and surrounded parts of the mouth. The cavity of mouth is known as pharynx. The foregut extends in the form of the esophagus that has a thin wall(narrow) structure. Further extension of the canal would be called a crop that has a similar structure like the esophagus. The opening for crop called proventriculus/gizzard would be an organ that would be muscular in nature. There is a duo of glands(salivary).
Every salivary gland has branches where various secretions of different branches flow to a combined passage. The receptacle of salivary viz. reservoir that resembles a bladder is in place for both the salivary glands. These are mainly for the storage of the salivary secretions. Both the receptacles have a combined/common passage that is rectangular shaped that would open to the combined salivary passage. The mouth cavity near the labium is opened from the combined salivary passage. The chitin has its lining with the entire foregut. For facilitating food grinding, the chitin creates the proventricular teeth and the plate.
digestion process begins first at the mouth where the parts like mandibles and maxillae help to chew the food. The part named salivary carbohydrases digests food to a partial extent. The saliva juice lubricates the food and helps to swallow it. Later the food moves to the esophagus and then onto the crop. This is the point where food in its masticated form is stored temporarily. The next point where the food moves would be at the gizzard where it’s grinding takes place. There is a valve named stomodeal right at the joint of the stomach and gizzard.
The regurgitation of food would be prevented by this valve while ensuring smooth passage of food in the stomach. The food once entering the stomach are treated by the digestive enzymes created by the gastric caecae. The enzymes include invertase, amylase, tryptase, maltase, and lipase. The residual fats, proteins, and carbohydrates would be absorbed here
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The alimentary canal starts with the foregut which comprises the mouth and surrounded parts of the mouth. The cavity of mouth is known as pharynx. The foregut extends in the form of the esophagus that has a thin wall(narrow) structure. Further extension of the canal would be called a crop that has a similar structure like the esophagus. The opening for crop called proventriculus/gizzard would be an organ that would be muscular in nature. There is a duo of glands(salivary).
Every salivary gland has branches where various secretions of different branches flow to a combined passage. The receptacle of salivary viz. reservoir that resembles a bladder is in place for both the salivary glands. These are mainly for the storage of the salivary secretions. Both the receptacles have a combined/common passage that is rectangular shaped that would open to the combined salivary passage. The mouth cavity near the labium is opened from the combined salivary passage. The chitin has its lining with the entire foregut. For facilitating food grinding, the chitin creates the proventricular teeth and the plate.
digestion process begins first at the mouth where the parts like mandibles and maxillae help to chew the food. The part named salivary carbohydrases digests food to a partial extent. The saliva juice lubricates the food and helps to swallow it. Later the food moves to the esophagus and then onto the crop. This is the point where food in its masticated form is stored temporarily. The next point where the food moves would be at the gizzard where it’s grinding takes place. There is a valve named stomodeal right at the joint of the stomach and gizzard.
The regurgitation of food would be prevented by this valve while ensuring smooth passage of food in the stomach. The food once entering the stomach are treated by the digestive enzymes created by the gastric caecae. The enzymes include invertase, amylase, tryptase, maltase, and lipase. The residual fats, proteins, and carbohydrates would be absorbed here
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