Digestive system - large intestine, Biology

Assignment Help:

LARGE INTESTINE -

More wider. Arranged around small intestine in the form of ?. It is 1.5 m long. Villi & microvilli absent.

It shows 3 parts Ceacum, colon & rectum.

(i) Ceacum -

6 cm. wide. At Ileo ceacal junction, Ileoceacal valve is present.

Ceacum bears 8 cm. long vermiform appendix. (vestigeal organ), made up of lymphoid tissue.

Infection of appendix is appendicitis its removal is must i.e. appendictomy.

Ceacum is large in herbivorous for digestion & absorption of cellulose. So symbiotic bacteria and symbiotic protozoa are present.

(ii) Colon -

It is sacculated in appearance due to a series of constriction. It shows ascending colon, transverse colon, de- scending colon & sigmoid or pelvic colon.

In it 3 long bends Taeniae present, around these sac like haustra present having decomposer type of bacteria.

Ammonia is formed in it.

Here undigested food is converted into faeces. In children bacteria develop after 10 days of birth.

(iii) Rectum -

15-20 cm. long. It has longest folds and large blood vessels.

It leads to 2.5 cm. anal canal which open out side by anus.

Some time due to enlargement of rectal veins piles are caused.

Anus is guarded by two sphinctors, inner of involuntary muscles and external of voluntary muscles.

In Aves Bursa febrichi is cloacal thymus.


Related Discussions:- Digestive system - large intestine

Explain major divisions of the hypophysis, Q. What are the major divisions ...

Q. What are the major divisions of the hypophysis? What are their functions? The hypophysis is divided into two portions- the anterior hypophysis or adenohypophysis and the pos

Organisational behaviour of health care, Organisational Behaviour of Health...

Organisational Behaviour of Health Care The insights provided by the theories of organisational behaviour emphasise the need for the establishment of institutional frameworks

Which of following is not true regarding the immune response, Which of the ...

Which of the following is not true regarding the immune response? Answer The immune response uses chemical and phagocytic cells to destroy foreign cells. Once initiated, the immune

Gastropods - feeding and digestion in molluscs, Gastropods - Feeding and Di...

Gastropods - Feeding and Digestion in Molluscs In several gastropods the digestion is extracellular. Though, some herbivore gastropods like Crepidula are ciliary feeders and h

Name the foods to avoid in soft diet, Name the Foods to avoid  in soft die...

Name the Foods to avoid  in soft diet include: Fried foods and nuts, rich pastries and desserts, Raw  vegetables, Heavily spiced foods, Gas-forming vegetables, S

Explain the physical work capacity tests, Explain The physical work capacit...

Explain The physical work capacity tests? The physical work capacity tests include common tests like running staircases (Step test) or using a bicycle ergo meter or treadmill.

What is the typical vegetation of the grasslands, What is the typical veget...

What is the typical vegetation of the grasslands? Grasslands are mostly formed of herbaceous (nonwoody) vegetation: grass, bushes and small trees. Biomes - Image Diversity:

Define the recommended dietary allowances of vitamin k, Define the Recommen...

Define the Recommended Dietary Allowances of Vitamin K? Recommended dietary intakes have not been suggested for different age groups or gentler. The safe levels of intake have

Describe bentham and hookers system, Q. Describe Bentham and Hookers System...

Q. Describe Bentham and Hookers System? Bernard de Jussieu (1699-1776) tried to classify the plants in Royal Garden, Paris. During this exercise he developed a system of classi

What are neurons, Question 1 Give the definition and describe the mechanis...

Question 1 Give the definition and describe the mechanism of Active transport. Passive transport with suitable examples Question 2 What are neurons? List out the

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