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Why, even though they have an open circulatory system, can flying insects like flies beat their wings with great speed?
In insects the circulatory system is open but this system does not participate in the gas exchange process and in oxygen supply to the tissues. Gases go in and out by the independent tracheal system that permits direct contact of cells with the ambient air. Thus an insect can supply the great oxygen demand of its fast-beating wing muscles even having open circulatory system.
Circulatory System Coelenterates and platyhelminths nutrients in sponges, respiratory gases and waste materials can easily diffuse through the intercellular spaces. Though, in
Minerals :- Phosphates Food Source Ubiquitous, animal products tend to be good sources Nutritional Functional role Essential nutrient: Deficiency is rare due
Gregor Mendel's Law of Independent Segregation referred to which of the following genetic elements? A. Alleles of two genes that reside on the similar chromosome B. Alleles
FUNCTION S OF KIDNEY - 1. Excretion of nitrogenous wastes. 2. Maintenance of water balance or osmoregulation. 3. Acid base balance or regulation of pH.
Q. Use of Sulphur dioxide and sulphites in microorganisms? Sulphur dioxide as a preservative in wine preparation has been in use since ancient times. It is also used in other f
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Explain the Objectives of Congenital Heart Disease ? After reading this unit, you should be able to: 1 Comprehenced the epidemiologic significance of congenital heart disease (
Animal products too are widely used in medicines by traditional societies, and in some urbanized societies that believe in traditional animal-based remedies. Examples of such produ
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