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

Evolution of dental implants, The first evidence of implants dates back to ...

The first evidence of implants dates back to 600 A.D. in the Mayan population. There are reports that the ancient Egyptians attempted intra-osseous implantation of animal teeth or

Explain bleeding on probing, Bleeding on Probing (BOP) BOP when elicite...

Bleeding on Probing (BOP) BOP when elicited (notated in patient record as BOP +) after the insertion of a probe into the sulcus with light pressure i.e. 25 N has been shown to

Define causes of iron deficiency anaemia, Define Causes of iron Deficiency ...

Define Causes of iron Deficiency Anaemia? Anaemia is a condition in which the blood cannot carry enough oxygen. This may be because there are fewer red blood cells than normal,

Describe some food borne diseases, Q. Describe some Food borne disease? ...

Q. Describe some Food borne disease? Food borne diseases are caused by the ingestion of foods containing toxic or infectious agents. In India, the diseases transmitted by foo

Why iron is required as a part of haemoglobin, Why Iron is required as a pa...

Why Iron is required as a part of haemoglobin? As a part of haemoglobin, iron is required for the transport of oxygen, to all cells in the body. Thus, haemoglobin is critical f

Explain risk evaluation, Explain Risk  evaluation Risk  evaluation: Th...

Explain Risk  evaluation Risk  evaluation: The  risk  evaluation involves: A) identification of a food safety problem B) Establishment of a risk profile C) Ranking of

How many are the known amino acids, How many are the known amino acids that...

How many are the known amino acids that form proteins in living beings? There are twenty dissimilar known amino acids that form proteins related to the genetic code of the livi

Effect of sodium chloride concentration on water activity, Solutes and ions...

Solutes and ions tie up water in solution. Solutes lower aw and this reduction in aw depends on the total concentration of dissolved molecules and ions. Since these bind to water m

Explain protease inhibitors, Protease inhibitors (PIs) Protease inhibi...

Protease inhibitors (PIs) Protease inhibitors prevent cleavage of protein precursors essential for HIV maturation, infection of new cells and viral replication. Use of a prote

Gas exchange, what arethe organs of respirationin the lower form of animals...

what arethe organs of respirationin the lower form of animals?

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