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

Define citric acid cycle, The citric acid cycle also called as the TCA cycl...

The citric acid cycle also called as the TCA cycle (tricarboxylic acid cycle) and the Krebs cycle or the Szent-Györgyi-Krebs cycle is a series of chemical reactions used by all aer

Which are the plant tissues that cover the stem and leaves, Which are the p...

Which are the plant tissues that cover the stem and the leaves? The stem may be enclosed by epidermis (having stomata, cuticle and photosynthetic cells) as in monocots or, alte

Explain about long acting insulin, Q. Explain about Long acting insulin? ...

Q. Explain about Long acting insulin? Long acting: Long acting insulin does not work until 4 Lo 8 hours after injecting. Its peak activity occurs 18 to 24 hours after injectio

Control of noise pollution, Following ways can be used for control of noise...

Following ways can be used for control of noise pollution: It can be controlled by designing, fabricating and using quiter machines. In heavy industries, sound proof insul

Assigment, describe food procurement and digestion in ciliates.

describe food procurement and digestion in ciliates.

Evolution, describe the two scientific models for evolution (gradualism, pu...

describe the two scientific models for evolution (gradualism, punctuated equilibrium)

In which area lengthening of long bones occurs, Lengthening of long bones i...

Lengthening of long bones in humans takes place in a specific area of the bone. This area is known as the: a) Cancellous bone b) Medullary canal c) Periosteum (pron: per-

Unicellular organisms, How was it proved in the case of Amoeba that the key...

How was it proved in the case of Amoeba that the key to the life of a cell is Nucleus?

Difference between mussels and octopuses, Q. What is the difference between...

Q. What is the difference between mussels and octopuses regarding their circulatory systems? How does that difference influence the mobility of these animals? Cephalopod mollus

Characteristic features of phylum arthropoda, Characteristic Features of Ph...

Characteristic Features of Phylum Arthropoda Well-developed muscular system along with striated muscles attached to the exoskeleton, and visceral organs having smoot

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