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

Simple or unilayered epithelia, SIMPL E EPITHELIA (UNILAYERED EPITHELIA) -...

SIMPL E EPITHELIA (UNILAYERED EPITHELIA) - 1 .      SIMPLE SQUAMOUS EPITHELIUM (PAVEMENT EPITHELIUM) - It is composed of large flat cells whose edges fit closely toge

Explain procedure for test the presence of sugar in honey, Procedure for Te...

Procedure for Test the Presence of Sugar in Honey? 1. Mix 5 grams of honey with 5 ml ether in a mortar and pestle. 2. Decant off the ether extract into an evaporating dish.

Biochemical function - essential elements, Biochemical Function - Essential...

Biochemical Function - Essential Elements Elements Mg, Mn, K, Ca and Fe are cofactors for many enzymatic reactions. Fe is carrier of electrons in electron transfer chain. Phos

Deciduous senescence - senescence, Deciduous Senescence - Senescence O...

Deciduous Senescence - Senescence Only the leaves senesce as in many trees. The senescence of leaves, or abscission occurs when at the base of a leaf a layer of cells is laid

Cholesterol, CHOLESTEROL Other name is parental steroid. It is ...

CHOLESTEROL Other name is parental steroid. It is present all over the body but absent in cerebrospinal fluid. Cholesterol is found exclusively in animal food. It

Most abundant form under which nitrogen is found in nature, Q. What is the ...

Q. What is the most abundant form under which nitrogen is found in nature? The major abundant nitrogen-containing molecule found in nature is molecular nitrogen (N2). The air i

Describe the working of golgi bodies, Define in brief about the Golgi bodie...

Define in brief about the Golgi bodies In a cell is achieved in a remarkable fashion by the Golgi bodies. The latter receive the newly synthesised proteins from the rough endop

Is the neural impulse generated by the stimulus, Q. Is the neural impulse g...

Q. Is the neural impulse generated by the stimulus that triggers the arch reflex restricted within the neurons of this circuit? This is obvious since the person that received t

Metaphase chromosomes, Metaphase chromosomes: Each metaphase chromoso...

Metaphase chromosomes: Each metaphase chromosomes is a duplicated structure which consists of two sister chromatids, attached at a point called centromere or primary constric

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