Blood Vessels – Arteries and Veins Blood vessels are a network of branched tubes that transport blood. There are three types of blood vessels namely arteries, veins and capillaries Arteries: They are thick and elastic vessels that carry blood away from the heart to various organs of the body. All arteries carry oxygenated blood except […]
Blood Blood is the main circulatory medium in the human body. It is a red-coloured fluid connective tissue. Functions of blood Transport of respiratory gases (Oxygen and CO,). Transport of digested food materials to the different body cells. Transport of hormones. Transport of nitrogenous excretory products like ammonia, urea and uric acid. It is involved
HUMAN EYE The human eyes are the most valuable and sensitive organs responsible for vision. They are the gateway to the wonderful world. Structure of the eye The eyeball is approximately spherical in shape with a diameter of about 2.3 cm. It consists of a tough membrane called the sclera, which protects the internal
Definition of Electric current Electric current is often termed as ‘current’ and it is represented by the symbol ‘I. It is defined as the rate of flow of charges in a conductor. This means that the electric current represents the number of charges flowing in any cross-section of a conductor (say a metal wire) in
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Biogas Biogas is a mixture of methane (nearly 75%), hydrogen sulphide, carbon dioxide and hydrogen. It is produced by the decomposition of animal wastes (cow dung) and plant wastes in the absence of oxygen. It is also commonly called as ‘Gobar gas’ since the starting material used is cow dung which means gobar in Hindi.
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Features of Groups The vertical columns in the periodic table starting from top to bottom are called groups. There are 18 groups in the periodic table. Based on the common characteristics of elements in each group, they can be grouped as various families. Group Number Family 1 Alkali Metals 2 Alkaline earth metals 3 to
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Lasers Lasers are light beams that are powerful enough to travel miles into the sky and cut through lumps of metal. Characteristics of Lasers Superior Monochromatism Superior Directivity Superior Coherence High Output Uses of Laser Tools Cutting tools that employ CO2 lasers are widely used in industries. They are precise, easy to automate and don’t
Article 40 Article 40 came to be incorporated in the Constitution, as part of the Directive Principles of the State policy (Part –IV) of the Constitution of India adopted on Nov. 26th 1949. Art. 40 States that, “the state shall take steps to organize village panchayats and endow them with such powers and authority as
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Automobile Industry India is set to emerge not only as a large domestic market for automobile manufacturers but also as a crucial link in the global automotive chain. It is one of the most dynamic industrial groups in India. The first automobile industry of India was started in 1947. The industry is Premier Automobiles Ltd
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Conservation of Forests India has an area of 752.3 lakh hectares classified as reserved forests and 215.1 lakh hectares as protected forests. The important measures taken for the conservation of forests are as follows Afforestation: Activities for afforestation Programme (Van Mahotsav) includes planting and protecting trees with multiple uses which help in the restoration of
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