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

Infectious diseases, what are pathogenic characteristics of protoctista?

what are pathogenic characteristics of protoctista?

Heterotrophic plant, #question.name any two plants having heterotrophic mod...

#question.name any two plants having heterotrophic mode of nutrition .

Explain the structure of fungi, Explain the Structure of Fungi? The veg...

Explain the Structure of Fungi? The vegetative structure of a fungus is called thallus. It varies in complexity and size, ranging from unicellular yeasts to multicellular mould

Cold chain system, Cold Chain System Vaccines are sensitive to heat. ...

Cold Chain System Vaccines are sensitive to heat. On exposure to heat their potency is lost. Once a vaccine has lost its potency it cannot be regained, so it is important

Restricted lung diseases, Restricted Lung Diseases Restricted lung dis...

Restricted Lung Diseases Restricted lung disease are classified into the following: Parenchymal inflammation. This can be due to infection e.g. pneumonia acute bronchi

Plants, why roots grow downword

why roots grow downword

What is the energy source used in active transport, What is the energy sour...

What is the energy source used in active transport through biological membranes? The energy essential for active transport (against the concentration gradient of the transporte

Define the water bath with shaker, Define the Water Bath with Shaker? A...

Define the Water Bath with Shaker? An electric water bath with a shaker that can hold test tubes as well as conical flasks. When on a non-shake mode, it acts as a simple water

How bone implant interface can be evaluated, How bone implant interface can...

How bone implant interface can be evaluated 1) Evaluation of the bone - implant interface can be done by following: i) Implant mobility and discomfort a)  Clinical implan

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