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

Common equine diseases, COMMON EQUINE DISEASES - 1 .       INFLUENZA ...

COMMON EQUINE DISEASES - 1 .       INFLUENZA OR PINK EYE - Pink eyes. Swallon eye lids. 2.       STRANGLES - Fever, dullness, depression, nasal discharge, lumpy a

Plant tissues responsible for the supporting of the plant, Which are plant ...

Which are plant tissues responsible for the supporting of the plant? The plant supporting tissues are the sclerenchyma and the collenchyma. The collenchyma is made of elonga

Explain about pantothenic acid, Pantothenic acid (Calcium pantothenate) ...

Pantothenic acid (Calcium pantothenate) Calcium pantothenate is a white, loose, faintly hygroscopic powder without odour and of bitter taste. It is easily soluble in water, gly

Neural circuits, Neural Circuits The simple all are none activities of...

Neural Circuits The simple all are none activities of a single neuron can hardly provide the adaptability needed for the constant changes faced by the organism in its internal

Determine food sources for zinc, Determine Food Sources of Zinc? Zinc i...

Determine Food Sources of Zinc? Zinc is normally associated with the protein and/or nucleic acid fraction of foods. Thus, foods high in proteins are good sources of zinc. Lean

Disposal-lab animals, Disposal : Opaque bags are the recommended for dispo...

Disposal : Opaque bags are the recommended for disposing off carcasses. You should also put freshly dissected animals and tissues into opaque plastic bags, seal them and dispose t

Specialized structures that help the adhesion between cells, Q. What are th...

Q. What are the specialized structures that help the adhesion between cells? The structures responsible for the union of the epithelial cells are called cell junctions. The mai

Resource use of biodiversity, Biodiversity is multiple resource based offer...

Biodiversity is multiple resource based offering us a range of products, materials and services. Our survival and well being of man-kind is directly dependent on biodiversity. Biod

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