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

Discuss about the halstead reitan battery, Discuss about the Halstead Reita...

Discuss about the Halstead Reitan battery The Halstead Reitan battery continues to be widely used as a clinical and research procedure. Numerous investigators use it in their r

Marek''s disease (md), M a r e k ' s disease (MD) It is a lymphop...

M a r e k ' s disease (MD) It is a lymphopoliferative disease of domestic chicken caused by a herpes virus. Of the known 3 serotypes of MDV, Serotype I includes all the o

Biota of littoral zone, Biota of Littoral Zone This zone is the shore ...

Biota of Littoral Zone This zone is the shore region of the marine ecosystems and is subject to violence of waves and tides, fluctuation of water level and variability of temp

Point mutations are caused by substances mutagens explain, Point mutations ...

Point mutations are often caused by substances called mutagens explain? Point mutations are often caused by substances called mutagens. Base analogs, such as 5-bromouracil, a t

Treatments of coronary, The treatment of hyperlipidemia requires two approa...

The treatment of hyperlipidemia requires two approaches: Therapeutic lifestyle changes (TLC) and medications. To achieve target LDL levels, most patients need both approaches si

Kreb''s cycle, Kreb's cycle is the biochemical cycle in the cellular aerob...

Kreb's cycle is the biochemical cycle in the cellular aerobic metabolism where the acetyl CoA is combined with the oxaloacetate to form citric acid; the resulting citric acid is c

Amino acids, Amino acids are the subunits ( or the monomers) from which pr...

Amino acids are the subunits ( or the monomers) from which proteins (polymers) are assembled. Each amino acid comprises of an amino functional group, and a carboxyl acid group, an

Portion of double-stranded dna, Suppose that a portion of double-stranded D...

Suppose that a portion of double-stranded DNA in the middle of a large gene is being transcribed by an RNA polymerase. As the polymerase moves through the sequence of six bases sho

What is the type of reproduction that occurs in roundworms, What is the typ...

What is the type of reproduction that occurs in roundworms? What typical element do nematode sperm cells have? Nematodes reproduce sexually. The nematode sperm cell does not h

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