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Human ageing

Animals who defeated ageing.

Cellinsight Everything about human ageing and related diseases Immortal animals Nothing is forever in this world, death is certain, one day it will visit us. But there are some creatures that never die by natural aging process. Human cells are capable of dividing only 50 times, later the cells entered the senescence stage, and this is the exact reason for aging. Any animal which is not experiencing senescence can defeat ageing, today I am going to tell about such types of animals and how they live without the fear of ageing 1. Jelly fish (Turritopsis dohrnii)  Immortal jellyfish (Image credit goes to Wikimedia )  Jelly fishes are sea animals, included in the phylum coelenterata (cnideria). Turritopsis dohrnii is a species of jellyfish which is known as immortal jellyfish. Jellyfish reproduce both sexually and asexually.The life cycle consisted of three main stages, planulae,polyps and medusae. fertilized egg give birth to planula. The  Planula is the larval stage, after few da
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WHAT IS CORONA VIRUS?


Corona virus
Corona virus

Dear friends ,today the world is under a dangerous pandemic the COVID-19 so-many people dying word wide,so I think it is necessary to write on corona virus,how ever our regular subject remain 'human aging'
Before going the details of corona virus we should know what is viruses,

How pandemic is differ from epidemic?

 Epidemic is a disease that effects a large number of people in a region where as  a Pandemic is an infectious disease that has the ability to spread across continents or even the entire world.

What is virus?

In1886 Adolf mayor,a German agricultural chemist who first described about a disease,the tobacco mosaic disease,mosaic like appearance on leafs of tobacco plant.later Martinus Beijerich given the name Virus,Virus is a latin word,means a poisonous subsance                                       
Viruses are generally considered as non living things, but they active when enter a host cell.they consist of genetical codes(the RNA or DNA)body is covered  by a protein coat,which is known as. Capsids,in some virus especially in the case of novel corona virus the capsid is covered by two layers of lipids,which is known as envelop.viruses cannot multiply themself,they must enter living cell. When they Come out from a living cell they become inactive,this inactive virus is called as virion,this is responsible for infection.if it did n't get a host cell in certain time period the lipid coating and capsid begins to degrade,then it cannot attach to the host cell

Which are the corona viruses that attacked human?

Corona virus SARS-CoV(sever acute syndrome) is identified in southern China in 2003,MERS-CoV(Middle East respiratory syndrome)identified in Soudi Arabia in 2012,and this is the third one SARS-CoV2,the causativ agent of  the deseas COVID-19 and this virus also fist identified in China in 2019.

How long survive corona virus outside the host cell?

Novel corona virus can survive3 days on stainless steel surfaces and plastic surfaces,it can live on air for hours,one day on card boards and four hour on copper.the virus survive longer time at lower temperature,higher humidity and non porous surfaces like stainless steel.


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