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

How do hormonal tests to detect pregnancy work, Q. How do hormonal tests to...

Q. How do hormonal tests to detect pregnancy work? Laboratory tests to detect pregnancy commonly test for human chorionic gonadotropin (HCG) concentration in urine or blood sam

Ruminal tympany (bloat), R uminal tympany (Bloat) It is the over-diste...

R uminal tympany (Bloat) It is the over-distension of the rumen with gases which may be either frothy or free gas. The disease is characterized by change in silhouette of the

What is leaf cuticle, What is leaf cuticle? Leaf cuticle is a thin waxy...

What is leaf cuticle? Leaf cuticle is a thin waxy layer made of waxes and cutin on the outer surface of the leaf epidermis. Its function is near control the cellular transpirat

Epistasis, EPISTASIS Epistasis is the phenomenon of masking or suppress...

EPISTASIS Epistasis is the phenomenon of masking or suppressing the expression of a gene by another non allelic gene. The gene which suppresses the expression of a non allelic

Explain syphilis and hiv, Syphilis and HIV Most clinicians treat HIV-i...

Syphilis and HIV Most clinicians treat HIV-infected patients with syphilis and normal CSF with standard penicillin doses for the stage of syphilis, but some patients may need

Physical properties of protoplasm, P HYSICA L PROPERTIES OF PROTOPLASM - ...

P HYSICA L PROPERTIES OF PROTOPLASM - 1 .       Phase reversal - Due to difference in temperature outer part is gel and inner part of sol 2.       Tyndall effect - Be

Coelenterata – General characters and classification., Coelenterata – Gener...

Coelenterata – General characters and classification.

0smosis, what is the difination of osmosis

what is the difination of osmosis

Major events during gastrulation, MAJOR EVENTS DURING GASTRULATION - 1....

MAJOR EVENTS DURING GASTRULATION - 1.       There is rearrangement of cells due to morphogenetic movement of the cells of blastoderm. 2.       The three primary germ layer g

Define the importance of iodine in human, Define the importance of Iodine i...

Define the importance of Iodine in human? Iodine derives the nutritional importance as a constituent of thyroid hormones, 3,5,3',5' tetraiodo-thyronine (thyroxine or T 4 ) and

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