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Heart

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       About Human Heart: A well developed specialized system to transport nutrients,gases and hormones within the body.' This system is known as circulatory system,namely blood , blood vessels and heart.                   Blood is a fluid connective tissue. Blood circulates and transport essential substances such as oxygen and nutrients to the cells all over the body. It composed of plasma and blood cells.There are three type of blood cells or corpuscles. They are red blood cells(RBCs) or erythrocytes,white blood cells (WBCs)or leukocytes, and blood platelets or thrombocytes. Diagram of Heart. The  heart  is a  muscular   organ  in most animals, which pumps  blood  through the  blood vessels  of the  circulatory system . [1]  Blood provides the body with  oxygen  and  nutrients , as well as assisting in the removal of  metabol...
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Gaganyaan

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Gaganyaan: A human trip to space The proposals have been sought by the Directorate of Human Space Programme of the Bangalore-headquartered ISRO for a total of 18 tentative technology development areas. The first manned mission of India to space ‘Gaganyaan’ is likely to take place around the year 2022. Gaganyaan space mission: For the development of indigenous technologies for sustained Indian human space programme as well as for space exploration, the Indian Space Research Organisation (ISRO) has recently invited proposals.  The proposals have been sought by the Directorate of Human Space Programme of the Bangalore-headquartered ISRO for a total of 18 tentative technology development areas. The first manned mission of India to space ‘Gaganyaan’ is likely to take place around the year 2022. At present, four Indian Air Force (IAF) fighter pilots are under training in Moscow, Russia, and they are likely to be potential candidates for the ‘Gaganyaan’ space mission, accordin...
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How to curb the climate heating by contrails

"Rerouting a fraction of flights may reduce the sooty clouds’ environmental impact" High-flying jets often create long white lines across the sky. Called contrails, those narrow clouds can vanish within minutes or last for days. Like other clouds, long-lasting contrails can trap heat in the atmosphere. Scientists have found in the last year or two that these contrails can boost the warming of Earth’s atmosphere. But it may be fairly simple to lower that contribution: Just make a few planes fly higher throughout much of their route. Engineers in England recently studied flights and contrails in a high-traffic part of the sky above Japan. Along the way, they turned up a surprising pattern. About 80 percent of the warming from contrails came from just 2 percent of the flights. “The fact that it’s such a small [number] of flights means we think it’s a feasible solution,” says engineer Marc Stettler. He led the study and works at Imperial College London. Sending just...
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