Circulatory system, Biology

Assignment Help:

Circulatory System

Coelenterates and platyhelminths nutrients in sponges, respiratory gases and waste materials can easily diffuse through the intercellular spaces. Though, in higher animals the circulatory system gives a medium through which oxygen and nutrients from the environment reach all the tissues of the body and carbon dioxide also nitrogenous waste materials are removed from the body into the external environment. The circulatory system consists of generally blood, the blood spaces and a series of tubes called vessels. Circulatory systems can be split into a number of components along with similar functions. In addition to the circulating fluid, these contain:

i) A main propulsive organ, generally a heart which forces blood around in the body,

ii) An arterial system that serves to distribute blood and as a pressure reservoir,

iii) Capillaries, or in some animals blood spaces, where transfer of materials take place between blood and tissues, and

iv) The venous system which acts as a blood reservoir and as a system for returning blood to the heart.


Related Discussions:- Circulatory system

Fats, definition and explanation of fats

definition and explanation of fats

Prophase, Prophase This is the first and longest phase of mitosis .At i...

Prophase This is the first and longest phase of mitosis .At its beginning  all  10 nm segments   of chromatids (= chromonemata)  of the  duplicated  chromatin fibres of interph

Green glands of crustaceans, Normal 0 false false false ...

Normal 0 false false false EN-IN X-NONE X-NONE MicrosoftInternetExplorer4

Fructose-1, Fructose-1,6-bisphosphate  and Fructose-6-phosphate : The  conv...

Fructose-1,6-bisphosphate  and Fructose-6-phosphate : The  conversion of  fructose-1,6- bisphosphate  to fructose-6-phosphate is  catalysed by fluctose-1,6-bisphosphatase  which  i

Streptococcal antibody test, In about 80 per cent of ARF patients, ASO titr...

In about 80 per cent of ARF patients, ASO titre is significantly raised. ASO titres vary with age, geographical area and other fevers, which influence frequency of streptococcal in

Final atp count in both prokaryotes and eukaryotes, Degrade a monoglyceride...

Degrade a monoglyceride that has an 18-carbon fatty acid attached to it by Ester bonds. You will have to degrade the glycerol component followed by the fatty acid in presence of O2

Explain tertiary and quaternary structure of proteins, Explain Tertiary str...

Explain Tertiary structure and Quaternary structure of proteins Tertiary structure Secondary structure, in turn, folds back and bonds to itself in a three-dimensional mann

How are the proteins important in metabolism of lens, How are the proteins ...

How are the proteins important in metabolism of lens? Proteins Physical slate of protein is important for transparency of lens. Morner first time classified protein of l

Determine about the diseases sleep attacks, Determine about the diseases Sl...

Determine about the diseases Sleep attacks These are brief, often irresistible, episodes of sleep, probably slow wave, NREM, naplike sleep that last about 15 minutes and can oc

Copper - mineral elements, COPPER It is a trace element which is availa...

COPPER It is a trace element which is available in most of the fruits. Maximum in heart, brain, kidney & crustaceans. By its deficiency monkin's disease is caused. Cop

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