Organism to present a large intestinal surface, Biology

Assignment Help:

Q. After digestion the next step is absorption done by cells of the mucous membrane of the intestine. For this task a large absorption surface is an advantage. How is it possible in the small internal space of the body of a pluricellular organism to present a large intestinal surface?

Evolution tried to solve this problem in two ways the simplest is the tubular and long shape of the bowels approximately eight meters in extension making possible that numerous small intestine loops fold closely. More effective solutions are the microvilli and the intestinal villi of the mucosal membrane cells.

The intestinal wall isn't smooth. The mucous membrane together with its submucosa projects inside the gut lumen like glove fingers forming invaginations and villi that multiply the available surface for absorption in addition the epithelial cells that cover these villi have themselves numerous hairlike projections called as microvilli on the external face (lumen face) of their plasma membrane. The absorptive area of the intestines is thus improve hundreds of times with these solutions.

In the ileum and jejunum there are folds that have the function of increasing the absorption surface too.


Related Discussions:- Organism to present a large intestinal surface

Explain a renewable exhaustible natural resource, A renewable exhaustible n...

A renewable exhaustible natural resource is: 1. Coal 2. Petroleum 3. Minerals 4. Forest Forest is a renewable exhaustible natural resource

What factor below contributed to the current variations, According to the t...

According to the theory of natural selection, what factor below contributed to the current variations in beak sizes of finch species on the Galapagos islands? a. Finches dispersed

Define the characteristics of bt cotton, Some of the characteristics of Bt ...

Some of the characteristics of Bt cotton are: 1.  Long fibre and resistance to aphids 2.  Medium yield, long fibre and resistance to beetle pests 3.  High yield and produ

Zoology, #question.characteristics of coelenterata?.

#question.characteristics of coelenterata?.

Define physical capacity tests for aerobic capacity, Define Physical Capaci...

Define Physical Capacity Tests for Aerobic capacity? Aerobic capacity has already been defined. Aerobic capacity is usually measured using a tread mill test in which the intens

What are the types of colloidal dispersions, What are the types of colloida...

What are the types of colloidal dispersions Depending upon the relative affinity of the dispersed phase for the dispersion medium, colloidal dispersions are, further divided in

What is the etiological agent of amebiasis, What is the etiological agent o...

What is the etiological agent of amebiasis? How is it transmitted and what are the typical manifestations of the disease? Amebiasis is caused by the protozoan Entamoeba histoly

Excretion., organisms and their excretory organelles

organisms and their excretory organelles

Which compounds results from cyclization of glucose, Which of the following...

Which of the following compounds results from cyclization of glucose? Select one: a. alpha-D-glucopyronose b. beta-D-glucopyronose c. alpha-D-glucofuranose d. beta-D

State about kidney, Which of the following is true for the kidney? A. A...

Which of the following is true for the kidney? A. Aquaporin1 (AQP1) channels are located in both luminal and basolateral membranes of epithelial cells in the descending limb of

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