Do You Know Why the Tortoise Has to Have Sunshine

Tortoises first appeared in the early Triassic period --- having already existed on the earth for tens of millions of years at the same period with dinosaurs ---- when they had fully-grown shells. What to Dress to Band? - the Best Choice The growth of tortoise is relatively slow. 5 Disadvantages You Should See About bandbags online So the life of it is more longer. What Really Worth The Price? Top brands AAA cree flashlight ! However, how long the tortoise could live actually has not been concluded finally. In general, it could live a hundred years. Some research said that it may live more than three hundred years, even more than thousands of years.

I have once raised a tortoise - at that time my purpose was not for appreciating, but for food - tortoise meat is really nutritious, rich in protein, minerals, etc., which can enhance the immune function of the body; In addition, tortoise meat and tortoise eggs taste quite delicious. "Tortoise meat is the combination of various kinds of meats" means that tortoise meat combines the nutrition and flavors of various animal meat, including beef, mutton, pork, chicken, fish, etc. A variety of "tortoise meat broth", which adopt tortoise meat as the main ingredient, has gradually become one of the most popular dish on high-ranking banquets.

Quite a few people see tortoises crawl to enjoy sunshine. Then why tortoises go sunning? The sun of high temperature will eradiate radiation, and the ultraviolet light can easily trigger chemical reactions of material, among which, the shorter the wavelength is, the more likely the reactions will happen. Being exposed to ultraviolet rays for a long time, a person is likely to get his skin burnt, and even have pathological changes in the skin.UVC can pass through any creature`s body, harming the cells, and causing canceration and genetic variations. UVB may damage to epidermis sheath cause the skin occur spot reaction cause thickening and aging of the epidermis layer even develop skin cancer and exert a remarkable influence on human health; Also, UVA can penetrate the epidermis and directly damage dermis, causing many irrecoverable damage of less elasticity, more wrinkles, increasingly aging on the skin. What`s more, it may also increase the exposure under the UVB of the skin to increase the rate of skin cancer

Luckily, there`s a layer of atmosphere around the surface of the earth. When the sun shines through, most of the ultra-violet is absorbed or rediated back into the space by the ozone in the stratosphere. Then we are protected from being hurt. However, sun rays directly at noon. And the atmosphere it passed is relatively meager. So there is more UV rays shone to the ground.

Because of environmental pollution, the ozone layer is getting thinner now - one of its important functions is to shield UVC irradiation for the earth's surface - the global incidence of skin cancer is increaseing year by year, even leading to the emergence of polar ozone hole. UVC can march into the ground there-because the ozone layer can take in all UVC before; so the creatures on the earth have no ability to desist the UVC. UVA is the major radiation heat and when it shines human body will make people feel heat, warm will produce heat transfer and increase cell activity thus can help the body run much better. As for UVB, the human body or the daily animal can make use of its shining to synthesize Vitamine D, absorbing it into the body through the cuticle to make it metabolize with the calcium.

So tortoise can stimulate its appetite and breeding ability by UVA. It can also avoid of the chance of a series of relative diseases such as lacking in calcium, animal's chondropathy and muscle atrophy by synthesizing vitamine D from UVB. Otherwise, the shells will become soft; the back will be valgus. At this moment, various fungi will invade the body and threat the life, except that it removes these bacteria through UVC. From all of these, the most fundamental purpose of tortoises` [sun" is to survive, which has a considerable difference from our people`s aims of health and beauty.