Animals in general have hair, why don t elephants grow hair?

Elephant. The surface of the surface is hairy, but it is sparse. If you look at **, in fact, all mammals.

Both have hair, and hair is one of the characteristics of mammals. Elephants live in the tropics.

They don't have to. So one of the reasons why elephants don't grow hair is the climate. But many mammals that live in the same place as elephants, such as zebras, giraffes.

and lions, both have hair, so why does the elephant's body hair degenerate so much.

The elephant's body temperature must be maintained at 36 degrees Celsius.

Left and right, if the body temperature is too high or too low, it can be life-threatening. Body temperature is metabolized in cells.

The total amount produced in the process is more or less fixed, but the ambient temperature is constantly changing. Living elephants live in tropical regions, where the climate is very hot, and they don't need hair to keep warm, so they rarely grow hair. The absence of hair on elephants today suggests that elephants once had long hair, but lost most of it in the process of evolution.

In the process of adapting to the environment, different living habits and forms are formed.

The same goes for animal hair, some animals are adapted to cold environments, so they grow long hair to keep warm. And elephants are very thick and mostly live in tropical areas, so thinning hair is a better way for them to dissipate heat. The body actually has hair, but the hair is very short, sparsely distributed, and not easy to see.

Elephants mostly grow in tropical regions, so their hair should not be too long to help dissipate heat from their bodies. In fact, they are hairy, but since they are short, thin, and relatively low in density, their bodies are visually hairless. In the process of adapting to the environment, animals form different living habits and forms.

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Animals generally have hair to keep warm, but elephants don't usually live in particularly cold temperatures, so they don't need to grow hair.

Because the skin of the elephant is very thick, and the elephant's skin can withstand the cold, there is no need for long hair, plus everyone is a tropical animal.

Because elephants live in lively areas, where the temperature is very hot, they don't need to use hair to keep warm, so they rarely grow hair.

Elephants are indeed hairy.

Elephants live in the tropics, so they have little fur but sweat hair.

The basic characteristics of elephants are long trunks and tusks.

The rhinoceros is characterized by horns on its snout.

Antelope has slender limbs and long, thin horns.

Lizards are cold-blooded animals that bask in the sun and are oviparous.

Elephants have two large ears that can hear any wind and grass in the savannah, and can also be used to chase flies.

The elephant's two tusks are very sharp and the proportions of size are amazing, which is their best self-defense**.

Finally, be sure to introduce the elephant's long trunk, because of its long tube covered with elephant skin, like a trumpet. When the mother elephant is going to do the year-end cleaning at home, the elephant's trunk is the best vacuum cleaner; When the father elephant wants to water the flowers in his garden, the trunk is the best watering pipe The elephant has two large ears that can hear any wind and grass in the savannah, and can also be used to chase flies.

The elephant's two tusks are very sharp and the proportions of size are amazing, which is their best self-defense**.

There are mammoths, and they're big, and they're all very hairy.

Another characteristic of elephants that is less noticed is that it has extremely sparse hair. Hair is one of the characteristics of mammals, with more than 99 land mammals having fur, with elephants being a rare exception. There is no need for existing elephants to live in the tropics.

So one factor why elephants don't grow hair is the climate. But many mammals that live in the same place as elephants, such as zebras, giraffes, and lions, have hair, so why is the elephant's body hair so badly degraded?

The elephant's body temperature must be maintained at about 36 degrees Celsius, which can be life-threatening if it is too high or too low. Body heat is produced during cellular metabolism, and their total amount is more or less constant, but the temperature of the environment is constantly changing. If the temperature is lower than body temperature, then it is necessary to prevent the loss of body heat, which is the main function of hair; And if the temperature is higher than the body temperature, you should find a way to dissipate the body heat as much as possible.

A must-have, and it's hard.

Elephants have hair on their bodies, but the hair is relatively short and sparsely distributed, making it difficult to spot. Elephant sedan chairs are basically grown in tropical areas, in order to dissipate body heat, so the hair should not be too long.

Geographical distribution of elephants:

Asian elephants were widely distributed (before the 14th century BC) in the basins of the Euphrates and Tigris rivers, through the Himalayas in South Asia, and east to China. It covers an area of 9 million square kilometers from West Asia through the coast of Iran to the Indian subcontinent to Southeast Asia (Sumatra, Java, Borneo) and on both sides of the Yangtze River in China. The remaining Asian elephants are only scattered in the above areas, and are extinct in West Asia, Java, and most of China, with a distribution area of only 486,800 square kilometers.

Today's Asian elephants are scattered only in isolated populations in Bangladesh, Bhutan, Cambodia, China, India, Indonesia, Laos, Malaysia, Myanmar, Nepal, Sri Lanka, Thailand and Vietnam, as well as in the Andaman Islands (India).

Once found throughout the continent, the African savannah elephant is now distributed in 24 countries, and its range is also shrinking and becoming more fragmented. It is estimated that African savannah elephants occupy only 15% of their historical range. In Burundi and Mauritania, the African savannah elephant has become extinct.

In Eswatini, the African savannah elephant was once extinct, but it began to be reintroduced in the 80s of the 20th century and is now gradually recovering. In Kenya and Botswana, the range of grassland elephants has expanded significantly.

Once distributed in the humid forests of West and Central Africa, the African forest elephant is now distributed in 20 countries, and its range in West Africa is shrinking and highly fragmented. The number of African forest elephants has been reported to be less than 100 in all seven range countries, including Senegal. In Angola and South Sudan, a few forest elephants survive.

In The Gambia, forest elephants are extinct. Most of the remaining forest elephants are distributed in the six countries of Central Africa, accounting for only about 25 per cent of the historical range. <

Most of the elephants now live in the tropics, including African bush elephants, African forest elephants, and Asian elephants; There are also elephants that live in the cold zone. However, there is a big difference between cold elephants and tropical elephants, which have very long hair, however, their ears are very small; Tropical elephants not only have little or no hair on their bodies, but they also have very large ears.

What is the reason for this?,With the mentality of asking why for everything.,I read on.。 I see, they have their own characteristics, and they are originally for their own purpose of survival. In the tropics, you and I are well known that the temperature is very high, and even humans will think of wearing less clothes to achieve the purpose of heat dissipation.

African bush elephants, African forest elephants, and Asian elephants have no or very little hair on their bodies, and their ears are very large, could it be that they are also like humans, and they are not able to dissipate heat? They are very large in size and very impressive in quality. Shoulder height approx.

Rice. Weight. ton, the head is large, the ears are as big as a fan, and the limbs are as thick as a cylinder. With such a huge volume and mass, you must be able to imagine that they must produce a lot of heat in their bodies, so if they want to dissipate so much heat, they must rely on their big ears. The big ears can be incited back and forth constantly to dissipate the heat flowing through the ears, so that the blood of the whole body can be cooled; There is no hair on the body or there is very little hair, which is also necessary for heat dissipation.

For the same purpose, elephants in the cold zone have very long hairs and very small ears in order to be able to absorb enough heat, because the temperature in the cold zone is very low?