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

Explain the drug effects on nutritional status, Explain the Drug Effects on...

Explain the Drug Effects on Nutritional Status? Drugs can affect nutritional status in a number of ways i.e. by enhancing excretion of certain nutrients, by interfering with nu

Define briefly about the nutrition security, Define Briefly about the Nutri...

Define Briefly about the Nutrition security? Nutrition security can be briefly defined as a balance between biological requirements in energy and nutrients and the quantity and

Will there be an opportunity to comment, Will there be an opportunity to co...

Will there be an opportunity to comment?  In a supplemental notice accompanying the last rule package, EPA is soliciting additional information and public comment on issues fro

Do sponges have circulatory system, Q. Do sponges have circulatory, nervous...

Q. Do sponges have circulatory, nervous and excretory systems? Sponges do not have a nervous system neither excretory system nor circulatory system.

Determine the lateral cephalometric skull view, Determine the Lateral Cepha...

Determine the Lateral Cephalometric Skull View The use of this modality is limited in preoperative evaluation in implant placement for advance cases where there is a need for b

Why dna ligase is needed to complete the replication, Which of the followin...

Which of the following best defines the reason why DNA ligase is needed to complete the replication of internal chromosomal segments? A. DNA ligase is able to delete the last n

Dissimmilarity between an ecosystem and a biome, What is the difference bet...

What is the difference between an ecosystem and a biome?

Define energy requirement for cancer patients, Define Energy Requirement fo...

Define Energy Requirement for Cancer Patients? It must be clear to you that cancer imposes increased energy demands because of the hyper-metabolic state of the disease process

Proximity between amino and ribosomes acids, Q. Why is the proximity betwee...

Q. Why is the proximity between amino and ribosomes acids important for the protein formation? What is the enzyme that catalyzes that reaction? The proximity between amino and

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