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

Lentic ecosystems, Lentic Ecosystems Lakes are inland, depressions co...

Lentic Ecosystems Lakes are inland, depressions containing standing water. They vary considerably in area and depth. The largest lake in the world, the lake Superior in North

Illustrate about the complex partial seizures, State about the Complex part...

State about the Complex partial seizures Complex partial seizures, another type of focal seizure, originate most commonly in the temporal lobe. Complex partial seizures are cha

What is an example of evolutionary novelty, Compared to amphibians what is ...

Compared to amphibians what is an example of evolutionary novelty present in beings of the class Reptilia against the loss of water through the skin? The reptile skin is kerat

Describe about congenital cardiac conditions encountered, Describe about Co...

Describe about Congenital Cardiac Conditions Encountered in Adults ? The entire population of adults with CHD is constituted by patients whose cardiac malformations have a natu

Explain the alanine cycle, The Alanine  cycle Follow the alanine link ...

The Alanine  cycle Follow the alanine link in the alanine cycle. The process goes as under: 1)  Pyruvate formed from glycolysis in  the muscle  is converted to  alanine by t

Define blood pressure, Blood Pressure Blood pressure may be defined as ...

Blood Pressure Blood pressure may be defined as the force or pressure which the blood exerts on the walls of the artery. Blood pressure varies with the age of the individual. B

Is acetylcholine used in consciousness, Q. Is Acetylcholine used in conscio...

Q. Is Acetylcholine used in consciousness? Cholinergic mechanisms are important in wakefulness and cortical activation. In general, increased acetylcholine is associated with w

Non-muscular movement, NON-MUSCULA R MOVEMENT - 1 .      Streaming m...

NON-MUSCULA R MOVEMENT - 1 .      Streaming movement - In amoeba, cyclosis is common. 2 .      Pseudopodial - In leucocyte, macrophages, amoeboid movement take place

How ignorance and poor socioeconomic cause pem, How Ignorance and Poor Soci...

How Ignorance and Poor Socioeconomic cause PEM? Status Improper childcare, either as a result of lack of knowledge or lack of time for mother, could also contribute to the onse

Cell, compare and contrast plant cell and animal cell with labeling diagram...

compare and contrast plant cell and animal cell with labeling diagrams

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