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Define Platelets
Blood platelets, the third blood cells are the smallest formed by the pinching of a very large bone marrow cell called megakaryocyte. Platelets literally mean a small plate. The platelets form a plug to stop bleeding when an injury disrupts the lining of the blood vessel. Their diameter is about 2-3 μm, hence they are much smaller than erythrocytes. Their density in the blood is 2, 00,000-3, 00,000 /mm3.
Zoology: The domestication of animals like horses and elephants and their use in warfare necessitated the study of their anatomy and physiology. A survey of Vedic literature h
Explain Specific Defence Mechanism In the section on white blood cells, we learnt that whenever a germ or infection enters our body, the WBCs snap to attention and destroy the
To show that soil contains air:- Place some soil in a glass jar or bottle and slowly pour water over it. Observe the air bubbles that increase by the water from the soil.
What is relative location? Relative location is the location of something in relation of another place.
Life in Atmosphere: Just like the earth, the atmosphere also sustains life. Various types of insects and mites, birds, bats and other organisms are some of the forms tha
is perkin''s condensation possible in aliphatic aldehyde?
Method of science: We have seen above that science is an enaeavour to understand nature and to mould it to satisfy human needs. In earlier units we have seen that, in this pr
Physical Properties of Amino acid:- Solubility : Amino acids are readily soluble in water, slightly soluble to insoluble in ethanol and insoluble in ether. Tyrosine is solubl
compare pisces and amphibian
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