Corona virus has become worldwide disease and all nations of the world are facing it. Due to which population of the world is forced to live inside their home. Business activities in the country also affected due to corona virus. As we all know coronavirus has taken life of a lot of people all across the globe. To prevent the spread of COVD-19, governments of different nations are taking multiple steps to control the spread of this virus. As far as our environment is concerned, it is enjoying the positive impact of this virus. Today, when the production of almost everything is on halt and factories are no longer as active as they used to be, the emission of smoke has lessened which has resulted in clear sky. Not only this, the use of vehicles on road is reduced. All this have contributed towards lowered CO2-emissions. The emission of nitrogen dioxide has also reduced. To combat coronavirus, companies have asked workers to work from home. This has reduced vehicles on road. In addition to this, the consumption of plastic has also reduced as people no longer have tea or coffee in disposable glasses. In this competitive era where we have to follow a hectic schedule, we have never had thought about the way we are treating the environment. However, now due to lockdown we are forced to stay at home, we have ample time to think on our actions. There is no denying the fact that coronavirus has had catastrophic impacts on mankind. However, it has surely given the environment a chance to self-heal and restore its beauty.
Circulatory system "Circulation means" anything which moves around. The system that contains the heart and the blood vessels and moves blood throughout the body . This system helps tissues get enough oxygen and nutrients, and it helps them get rid of waste products. Circulatory system is of two types 1. open circulatory system- where there is no blood vessels involved ex- cockroach and 2. closed circulatory system like human being where blood vessels supplies the blood to other organs. This system consists 3 organs 1. blood 2.blood vessels And most important 3. heart Blood vessels are further divided into two parts 1. arteries 2.veins The discovery of blood circulation system was done by William Harvey. Points to remember: Biological term of the heart is ‘Cardio’. Doctor Who study heart is called cardiologist our heart consist four Chambers And is of a size of closed fist Atrium are the upper parts and ventricles are there a lower parts heart. It rema...
Comments
Post a Comment
Thanks for showing interest. Join on Telegram Search airforcestudy on Telegram App.