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

Nutrition, The oxidation of sugar in the cell of higher organisms takes pla...

The oxidation of sugar in the cell of higher organisms takes place in the ?

Sublimation-evaporation-transpiration-water cycle , Sublimation is the pr...

Sublimation is the process by which solid water changes directly to vapour phase without passing through the intervening liquid phase. The gradual disappearance of flakes of ice

Heterotrophic nutrition, heterotrophic nutrition in any 5 type...

heterotrophic nutrition in any 5 types of organism

Dna, how atoms are arranged to work in DNA?

how atoms are arranged to work in DNA?

Explain radiology, Radiology is a medical specialty that employs the use of...

Radiology is a medical specialty that employs the use of imaging to both diagnose and treat disease visualised within the human body. Radiologists use an array of imaging technolog

Mollusca, An account of characters of mollusca

An account of characters of mollusca

Oxygen - factors influencing functions of nitrogenase, Oxygen - Factors Inf...

Oxygen - Factors Influencing Functions of Nitrogenase Oxygen is a strong inhibitor of N 2 -fixation because it blocks both the synthesis as well as the activity of nitrogenase

Explain biochemical tests bacterial testing, Explain Biochemical Tests Bact...

Explain Biochemical Tests Bacterial Testing? It deals with the various biochemical tests used to differentiate microorganisms. Identification of an unknown organism isolated fr

What is cell theory, What is cell theory? Cell theory declares that the...

What is cell theory? Cell theory declares that the cell is the constituent unit of living beings. Before the discovery of the cell, it was not identified that living beings

Radioisotope diagnostic procedures, RADIOISOTOPE DIAGNOSTIC PROCEDURE: ...

RADIOISOTOPE DIAGNOSTIC PROCEDURE: Radioisotope diagnostic procedures include perfusion, ventilation  and gallium scan. Perfusion Lung Scan Following  injection of a radio

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