Digestive system in cockroach, Biology

Assignment Help:

DIGESTIVE SYSTEM IN COCKROACH

ALIMENTARY CANAL

6-8 cm. long. Coiled, present from mouth to anus.

Differentiated into 3 parts -      1. Foregut            2. Midgut        3. Hindgut

1982_digestive system of cockroach.png

1.      FOREGUT

  1. Differentiated into pharynx, oesophagus, crop and gizzard.
  2. Pharynx is small tube like, present in neck.
  3. Pharynx is attached to oesophagus in thorax.
  4. Oesophagus forms crop (a sac like) upto 4th segment of abdomen.
  5. In crop food is stored & complete digestion takes place.
  6. At the base of crop gizzard or proventriculus present. Helpfull in grinding of food.
  7. Anterior part of gizzard is armarium, in it 6 denticles present made up of cuticle.
  8. Posterior part of gizzard is stomodeum in which 1 pair hairy pad pulvillus & 1 pair stomodeal valve present, allow only finnest particles of food.

2.      MID GUT

  1. Walls are soft and glandular. Starting point of mid gut is cardia.Digestion and absorption takes place in it.
  2. At the junction of mid gut and foregut 8 Hepatic ceacae present, secrete digestive juice that do digestion in crop.
  3. Secretion of stomodeal valve (Cardia) in mid gut forms peritrophic membrane around food to protect wall of mid gut.

3.      HIND GUT

  1. Differentiated into Iluem, colon & rectum.
  2. In ileum 6 spicules present function as sphinctor & tear off the peritrophic membrane.
  3. In colon undigested food is converted into faeces.
  4. In rectum on external surface 6 rectal ridges present alternate with 6 rectal pads on inner side.
  5. Maximum water is reabsorbed. Rectum opens outside by anus in 10th segment.
  6. Anus is controlled by 4 podical plates.

Related Discussions:- Digestive system in cockroach

Describe the process of crassulacean acid metabolism, Describe the process ...

Describe the process of Crassulacean acid metabolism. a) How is it advantageous to plants? b) Describe the major steps in Krebs cycle. Why is this cycle also called citric a

Define the food pricing, Define the Food Pricing? The pricing of the fo...

Define the Food Pricing? The pricing of the food products bought by the consumer is subject to multifarious factors. Each of the factors as discussed below can affect the prici

Methodology of environmental impact assessment, Environmental impact assess...

Environmental impact assessment consists of 4 phases which are as follows: (i)  Organizing the job. (ii)   Performing the assessment. (iii) Writing the environmental impac

What are the causes of endodontic pain, What are the causes of endodontic p...

What are the causes of endodontic pain? Lesions in retreatment cases called post endodontic diseases. Reasons of Endo retreatment; = reasons of failure: - Signs or symptoms of

Explain the functionality of central nervous system, Explain the functional...

Explain the functionality of Central Nervous System ? The central nervous system is the center of the nervous system, receiving impulses from, and sending impulses to, the per

Explain red anthocyanin pigments, Explain Red anthocyanin pigments Red ...

Explain Red anthocyanin pigments Red anthocyanin pigments from miracle fruit were isolated and tested in carbonated beverages, in combination with the organic acids. Pigments d

What do you mean by cori cycling, What do you mean by Cori Cycling? In ...

What do you mean by Cori Cycling? In this cycle, glucose released by peripheral tissues is metabolized to lactate, which is then resynthesized to glucose in the liver. This pro

Pre-operative nursing management of cardiac surgical patient, PRE-OPERATIVE...

PRE-OPERATIVE NURSING MANAGEMENT OF CARDIAC SURGICAL PATIENTS Cardiac surgical patients generally get investigated thoroughly before getting referred to the surgeons. Many of

Plate tectonic theory, Plate Tectonic Is a Theory of Geology Which describe...

Plate Tectonic Is a Theory of Geology Which describes the large scale motion of earth's lithosphere. The theory builds on the older theory of continental drift from the first half

Define proline, Define Proline It is a prominent amino acid found in fi...

Define Proline It is a prominent amino acid found in fish and may contribute to sweetness. The sugars ribose, glucose and glucose-6-phosphate are flavour contributors, as is 5-

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd