Capillaries - circulation, Biology

Assignment Help:

Capillaries - Circulation

We know that most tissues have such an extensive network of capillaries that any single cell is hardly 2-3 cells away from any capillary. The small terminal arteries subdivide to form arterioles which divide to form metarterioles and then capillaries, which rejoin to form the venules and veins.

The smooth muscles of the arterioles become discontinuous in the metarterioles and end in a muscle ring the precapillary sphincter that controls the blood supply to each capillary bed. Through the precapillary sphincters, the capillary bed can be bypassed altogether and blood can be diverted to areas of greater demand. All capillaries of an animal have the potential to hold 14% of the total blood volume. However, only 30% to 50% of all capillaries are open at a time and thus only 5-7% of the total volume is contained in them.


Related Discussions:- Capillaries - circulation

Sex-limited traits, Sex-Limited Traits Sex Limited Traits are traits ex...

Sex-Limited Traits Sex Limited Traits are traits expressed only in one sex, although the genes controlling thcm arc prcscnt as wcll as transmitted to both thc sexes. Therefore,

Describes the tenants of pangenesis theory, Which of the following best des...

Which of the following best describes the tenants of Pangenesis Theory? A. The hereditary material is composed in every organ/tissue and is transmitted to the next generation b

Explain a review of eating disorder, Explain a review of Eating Disorder? ...

Explain a review of Eating Disorder? If you talk to a group of young boys and girls in an informal setting about their physical appearance, you will find that a majority of the

Explain the working of senses: touch, Explain The working of Senses: Touch,...

Explain The working of Senses: Touch, Hearing, Equilibrium ? The senses are detected by sense organs, collections of receptor cells, or cells closely associated with them. A m

Neuron, It arises from a one embryonic cell known as neuroblast Types of...

It arises from a one embryonic cell known as neuroblast Types of neuron:  According to number of process¬ (a) Unipolar: Only axon is there. e.g. mesencephalic nucleus. (b)

Determine the diet chart for adolescents, Determine the Diet chart for Adol...

Determine the Diet chart for Adolescents? For adolescents, other than points covered above, there are two more important points of considerations. Inanition Fad diets

Explain process of selection of taxonomic characters, Explain process of Se...

Explain process of Selection of taxonomic characters Selection of taxonomic characters Eventually classification systems may be based almost entirely on direct study of th

Why theories are import, Theories are import because they can be used to a....

Theories are import because they can be used to a. Test research hypothesis b. Develop questions which will facilitate more effective research c. Conduct more meaningful and useful

Describe cluster analysis, Q. Describe Cluster analysis? After making a...

Q. Describe Cluster analysis? After making a similarity table, it is then rearranged so that OTU's whose members have the highest mutual similarity are brought together. This c

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