Who is the first person in the world to go into space?

 Who is the first person in the world to go into space?

 Russia's Colonel Yuri Alekseevich Gagarin first traveled to space. Yuri was born in 1934 in a simple farming family.

 He took training in aviation and earned a degree from the Zhukovsky Air Force Engineering Academy in 1967. Then on 12 April 1961, Yuri Gagarin, as the driver of the Vostok One spacecraft, orbited the Earth for 108 minutes.

 Returning from the journey, the words in which he described the black sky, bright stars and blue earth were no less than a poem.

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Why do bats hang upside down?

 Why do bats hang upside down?

 The reason for this is that by hanging upside down, bats can fly very easily.  Like other birds, they cannot take off from the ground, because their wings do not provide enough lift and their hind legs are so short and underdeveloped that they cannot accelerate by running.

 Bats usually rest, sleep throughout the day in dark caves and come out only at night.  The reason why they do not fall asleep is because the nerves of the legs of bats are arranged in such a way that their weight helps them to hold their claws firmly.

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Why does the tail of the Lizard get separated?

Why does the tail of the Lizard get separated?

 In this context, it may be surprising to know that the tail of a lizard does not break accidentally in these circumstances, but in such a situation, it separates it from its own body by jerking it.

 Most of the lizards have a longer tail than their body and when they are running for the safety of their life in fear, they separate their tail from the body to divert the attention of the enemy to the other side!

 This broken part of the tail keeps moving for a long time (you must know that every living part keeps on moving for some time when it is separated) and this distracts the attention of the enemy, due to which it itself secretly From there escape safely!

 The funny thing is that the lizard does not cause any pain or harm due to the separation of an important part of its body from the body, and after some time its new tail grows as before! This new tail does not take the same length as the old one.

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wounds howheal?

wounds howheal?

 Wound healing, or wound repair, is a complex process by which the skin (or any other organ) repairs itself after injury. In normal skin, the epithelial (outermost layer) and endoderm (inner layer) remain in a steady-state equilibrium and maintain a protective barrier against the external environment. The normal (physiological) process of wound healing begins immediately after the protective barrier is broken.

 The ideal pattern of wound repair is divided into three or four successive, but overlapping, stages: (1) hemorrhage (stop bleeding) (this is not considered a stage by some authors), (2) inflammation, (3) ) production and (4) reconstruction. skin injury,

 A complex biochemical event takes place in the form of a finely tuned cascade for wound repair. Within minutes after an injury, clotting cells (thrombocyte) accumulate at the site of injury to form a fibrin clot.

 This clot acts to stop active bleeding (hemorrhage). In the inflammatory stage, the bacteria and residues are consumed by the predator cells, and factors are released that cause the cells in the proliferative stage to migrate and divide.

 In the proliferative stage, there is blood vessel formation, collagen storage, granulation tissue formation, epithelialization and wound contraction. In blood vessel formation, new blood vessels are formed by vascular endothelial cells.

 In fibrogenesis and granulation tissue formation, fibroblasts proliferate and secrete collagen and fibronectin to form new, functioning extracellular matrix (ECM). Additionally, epidermal re-epithelialization occurs, in which epithelial cells proliferate and "crawl" over the wound to provide cover for new tissue.

 In contraction, the wound is further reduced in size by the action of myofibroblasts, which form a grip on the ends of the wound and compress themselves using a process similar to that of smooth muscle cells. When the role of these cells is fulfilled, spontaneous cell death occurs of unnecessary cells.

 In the maturation and remodeling stage, collagen regenerates and rearranges along stress lines and cells that are no longer needed are spontaneously removed by cell death. However, this process is not only complicated but also brittle, and it is likely to be disrupted or fail, leading to long-term canker sores. Factors that contribute to this include diabetes, vein or artery disease, old age, and infection.

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Why do fish die when taken out of water?

 Why do fish die when taken out of water?

 Fish is an aquatic animal, it does respiration through gills.  The gills absorb the oxygen dissolved in the water and release CO2.  When the fish is thrown out of the water for a while, the respiration stops and hence it dies.

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Why does the Earth and all the planets rotate on their axis?

 Why does the Earth and all the planets rotate on their axis?

 When the Solar System was formed, a cloud of gas was moving around its center.  This cloud later came into existence in the form of Sun and other planets.

 According to the law of indestructibility of angular momentum, all the objects should also rotate similar to the rotation of that cloud.  For the same reason, not only the Earth, all the planets and the Sun also rotate on their axis.

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Why do milk teeth break?

 Why do milk teeth break?

 Children usually begin to lose their primary teeth between the ages of 6 and 7, when their jaws are of mature size.  This is because a child's jaw is too small to accommodate a permanent tooth.  Between 6 years and 9 years, the child's jaw continues to develop, he slowly starts losing his teeth, permanent teeth start coming at the rate of milk teeth.  The permanent teeth growing from below loosen the milk teeth and come out.  Milk teeth are responsible for providing guidance for the growth of permanent teeth (adult teeth) and their proper placement.

 Different types of teeth fall out at different times, with the front teeth falling out first.  Bonus Info - Do Animals Lose Milk Teeth Too?  Yes, milk teeth are found in all types of mammals, including dogs, cats, which fall out and turn into permanent teeth.

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