Why are southerners shorter than northerners, please thank you

Mainly because of the climate and diet. Southerners have no less body hair than those in the north. The difference in climate makes the flora and fauna of the north grow taller.

For example, cabbage, radish, eggplant, tomato, watermelon, winter melon and other plants, pigs, cattle and other poultry are much fatter than those in the south. For people, northern Chinese are taller than southerners. The Nordics are taller than the southern Europeans and are the tallest people in the world.

The main thing is the relationship of latitude. The higher the latitude (north), the farther away from the equator, the colder the weather, people need to reduce the unit energy loss, and the body surface area must be increased, so northerners are taller. On the contrary, southerners, who are close to the equator and have hot weather, have to reduce their body surface area, so they are relatively short.

Northerners are taller, so their relative surface area is smaller. It can reduce the heat dissipation area and better maintain body temperature. Southerners are relatively short, so they can increase their relative surface area and facilitate heat dissipation.

The difference between the North and the South: From the appearance, the difference between the two can be clearly distinguished. Northerners are racially Far Easterners, and Southerners are a cross race of South Asians and Far Easterners.

Specifically, northerners have the following characteristics:1Tall, northern, northwestern, northeasterners are generally 6-10cm taller than southerners

It is the tallest race in East Asia and the tallest yellow race except for the Patagonian Indians. 2.The subcutaneous fat is thick, which is associated with a cold climate.

3.Lighter skin tone. 4.

The nasal bone is high, the nasal alar is underdeveloped, and the nasal index is small. 5.The cheekbones are located close to the eye sockets.

6.The eye cleft is small, and the eye is small. And there are many single phoenix eyes, both single eyelids and many eyelids.

7.The inner corner of the eye is low, the outer corner of the eye is high, and the eye is tilted upward. 8.

There is a Mongolian fold on the inner corner of the eye, which is formed by the inner upper eyelid covering the lacrimal gland downward at the corner of the eye. 9.The facial bones are wide.

10.The second stage has less coat (sexual hair) than southerners, which is different from our usual impression. 11.

The head index is small (the so-called head index, which is the ratio of the left and right width of the skull to the front and back lengths. The northern head index is of the middle head type, which is similar to the ethnic groups in North Asia and the Mongolian steppe. The head index in the south is above 80, which is similar to 81 in North Korea and 84 in Japan, and belongs to the short head type).

12.Thin lips. 13.

The outline of the bones is blurred. Correspondingly, southerners have the following characteristics:1

Shorter stature. 2.The subcutaneous fat is thin.

3.Dark skin tone. 4.

The nasal bone is low, the alar of the nose is well developed, and the nasal index is large. 5.Low cheekbones.

6.The eye cleft is large, with large eyes and multiple double eyelids. 7.

The inner and outer corners of the eyes are on the same level. 8.Only among the southerners"Northerners", and a small number of people have Mongolian folds.

9.The facial bones are narrow. 10.

Sexual hair is more developed than northerners. 11.The head index is large.

12.Thin lips. 13.

The bones are well defined. But this is not absolute, and there is a trend in general. The huge difference between southerners and northerners is not only related to the climate, but also to the historical development of the Han people.

Although the ethnic groups of the Han in the north and the Han in the south are different, they have much more in common than differences. Here are two unique in the world, one is the shovel-shaped incisors, which are cross-sectional'['Type; The other is lactating milk moss, also known as fetal traces, and the scientific name is Mongolian spot. Both shapes are available to 98% of the Han Chinese.

Of course, 90-95% of the Tibetans, Mongolians, Manchus, Koreans, and Hui who are similar to the Han are also present. After all, are we all members of the Chinese nation?

In terms of blood, southerners and northerners should not be classified as the same race, and the ancestors of northerners mostly entered China from Central Asia through Xinjiang, so you can find that Kazakhs and northerners look very similar! And the southerners came to China from Burma via Yunnan! So southerners don't speak Mandarin.

In fact, it has something to do with water and soil eating, northerners eat a lot of noodles, and the nutrition of noodles is higher than rice.

1. Temperature reasons: in the early north, the days were short and the nights were long. At night, people don't come out at home, and there is no entertainment at that time, so at night, people sleep the most.

We know that sleep plays a very important part of the equation in order to be tall, and with the participation of this factor, northerners have the foundation to grow taller. The weather in the south is dry and cold, and people need to constantly save energy to help themselves survive the cold, and part of the energy is consumed to resist the cold, and the energy used to grow taller will be reduced.

2. Geographical reasons: there are many hills and lakes in the southern region, and there are fewer transportation tools, vehicles and horses, and southerners have to consume a lot of physical strength whether they work or travel far away. In their leisure time, southerners also have to do a lot of physical labor, such as carrying things, etc., and the physical strength is used to consume labor, and the physical strength of the longer ones that are retained is naturally much less.

The terrain in the north is gentle, almost flat, so northerners have a lot of extra stamina and fat to grow taller.

3. Dietary reasons: Nowadays, northerners eat more pasta, which helps to store energy in the human body, and its protein content is high, which helps people grow tall. A long time ago, the northerners were mostly nomads, and the nomads ate more beef and mutton, which was not only rich in protein and energy, but also animal protein was more conducive to height development.

The southerners mostly eat rice-based food, and can only rely on poultry for protein intake, and southerners love to drink tea, tea is very good for modern people, but for the former southerners who do not have sufficient nutrition and tea to decompose nutrition, it is not a good thing.

4. Historical reasons: Wars in the north are frequent, and historically, many major wars and turmoil have occurred in the north. For example, during the Five Dynasties and Ten Kingdoms period in history, Kangxi, Ping, Sanpan, etc., all occurred in the northern region.

In the South, there is much less power instability than in the North. And the war brings the result of the survival of the fittest, and the rest of the people are the stronger people. The strong genes continued, forming a phenomenon in which northerners are taller than southerners.

According to the existing research results, 60%-80% of the height difference is genetically determined, while the remaining 20%-40% is due to external factors, that is, "seven points are destined, and three points depend on hard work". Height is closely related to genetics, and generally speaking, if both parents are taller, the child will not be shorter. The external factors mainly include climate, diet, sleep, etc., which also causes the difference in height between the north and the south.

The "Bergmann's Law" proposed by the German biologist Carl Bergmann states that for the same warm-blooded animal, the colder the place, the larger the volume. At the same temperature, the larger the volume, the slower the heat dissipation.

Because one of the functions of human beings is heat dissipation, human beings live in the tropics to dissipate more heat, and less heat dissipation in the cold zone, so as to help homeothermic animals adjust their body temperature. Due to the high latitudes and cold temperatures in the north, it is necessary to increase the body surface area in order to reduce the loss of unit energy. So northerners will grow very tall and big, while southerners will be the opposite.

The amount of growth hormone secreted by the body has a lot to do with sleep habits. In general, there are two key points: one is that the secretion of growth hormone at night is much higher than that during the day, and the other is that the growth hormone secretion at night is more in the first half of the night than in the second half of the night, and the two time periods with the highest growth hormone secretion overnight are 22:

00-2:00 and 5:00-7:

00, which accounts for about 90% of the secretion of nocturnal growth hormone, peaks at 23:00-1:00 and 6:00 in the morning

00 or so. Undoubtedly, the sleeping habits of the north are more conducive to the secretion of growth hormone.

First of all, the geographical environment has a lot of influence on the development of human bones; The north is at a high latitude, and under the irradiation of ultraviolet rays of the sun, it is conducive to the development and growth of human bones; However, the latitude in the south is relatively low, and the rainy season is very much, so the southerners will rarely get the sun; In addition, the north is relatively cold, in order to resist the cold, the north can only eat more to save calories, so the northerners are generally very tall;

The second point is related to sleep; The weather in the north is relatively cold, especially at night, so the northerners go to bed earlier at night. The south is different, the climate in the south is relatively warm, the night market is very developed, and the southerners often haunt at night and will not stop until midnight; Sleep can affect the body's growth hormone, so northerners who sleep more regularly are naturally much higher than southerners;

The third point has a lot to do with eating habits, northerners are more bold, they drink wine in large bowls and eat meat; The southerners, on the other hand, are more tactful; For example, northerners generally buy vegetables by the pound, while southerners buy them by the number of pieces; In the north, there are often ** chicken, back to the pot meat, which is a very oily meat dish, and it is not taboo at all; If you eat a lot of oil and water, your body will naturally be much taller; However, southerners are very particular about eating, and pay great attention to the combination of meat and vegetables, generally three dishes (two vegetables and one meat) and one soup;

Because of climatic reasons, the growth cycle of southerners is short, the growth cycle of northerners is long, southerners are basically not mature at the age of sixteen or seventeen, and northerners are on average 20 years old, such as rice in the northeast can only be harvested once a year and half a year, and once a year in three seasons and three months in Hainan

This is the principle of one side of the water and soil to raise one side of the people, just like genetics can determine the appearance of people, height, intellectual diseases, northerners prefer to engage in manual labor, including the northern economy is mainly farming, the weather in the north is also relatively cold, people are engaged in production tasks, so that northerners unconsciously get exercise, northerners are also accustomed to drinking wine, eating meat, over time, the body will be tall and mighty.

Because the south is rainy, the soil is acidic and lacks calcium.

Due to the many wars in the north, the Central Plains people moved to the south to escape the war, and most of the short people in the north were killed in the war.

Why South China tigers and Bengal tigers are generally smaller than Siberian tigers.

Nonsense, what climatic reason, blacks are not short.

It may be related to the region, after all, one side of the water and soil supports the other side.

Mammals are all shorter the closer to the tropics, for example, the Siberian tiger is larger than the South China tiger, the South China tiger is larger than the Bengal tiger, and the Sumatran tiger is about the same as the leopard.

Maybe it has something to do with habits, something to eat.

Maybe it has something to do with the weather and climate! The man's climate is relatively humid and muggy, and his diet is relatively simple, and the southerners are not as strong as the northerners.

First, human beings have been affected by gravity in the process of evolution; Second, genetic inheritance.

Because southerners are orthodox Chinese, they are short.

Geographical location and living habits are all related

Does it have anything to do with ethnicity and diet?

Because Genghis Khan is the northerner who killed, the genes have changed

The closer you are to the equator, the greater the gravitational pull of the Earth.

I think it's about the environment and climate.