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Define White Blood cells (WBCs)
WBCs are also called leukocytes, as they are colourless. They are the army of the human body. Whenever a germ or infection enters our body, the WBCs snap to attention and destroy the culprit. Their primary function is to produce antibodies (humoral immunity) or kill the invading bacteria directly (cytotoxic immunity). We will learn more about this later in the next unit on the Immune System.
Belt-drive: The beltdrive is a mmpratively simpler device than gearing for transmission of power and for increasing or decreasing the speed of motion. Beltdrive came to India
What determines sinking and floating? Shape a piece of lead, tin or aluminium foil into the form of a little boat and float it on the water in a pan; now wad the metal foil fro
Define Macrophages - CSF It is produced by macrophages, fibroblasts and endothelial cells. They specifically stimulate precursors of macrophages. It also enhances effector res
What is the distance of the sun from earth
Formation of the solar system: This theory is based on the assvmption that the Sun and all the planets were formed from a huge rotating cloud df interstellar gas and dust.
The water will not run through the cloth Choose a glass jar and a piece of cloth from an old sheet or handkerchief. Fill the jar with water. Wet the cloth well, stretch it over
Vitamin E (Tocopherols) Vitamin E is an essential fat-soluble vitamin that functions, at least in part, as a lipid- soluble antioxidant. Presence of vitamin E was first revea
Technology forecasting: With such power of science in relation to technology, and consequently to satisfy social need, the question arises, can technologies of the future be fo
VERIFICATION OF STOCK ITEMS : Now you know that a stock register is the key for the verification of all the items purchased from time to time. Let us now perform the second activi
Peripheral nervous system (pns): Except for the brain and the spinal cord, the rest of the network of nerves and neurons is included in tha peripheral nervous system, or
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