Why do humans eat meat and rice, and why do humans eat?

1. Eat to get nutrition, get energy, and survive.

2. People have to eat every day, and eat nutrients through meals to maintain life. Essential nutrients can be divided into six categories: proteins, carbohydrates (sugars), fats, inorganic salts and trace elements, vitamins, and water. Proteins, fats, and sugars all produce energy to sustain life, and energy is needed to carry out daily tasks.

3. Scientifically speaking, the body is consuming energy all the time to maintain the vitality of the body, and the body's digestive organs - stomach and intestines, if there is not enough food to convert energy, the body will send a signal of energy deficiency, and the purpose of eating is to replenish energy for daily consumption. This is also the reason why people who do manual work eat more than the average person.

4. Three meals a day, the protein digestion and absorption rate in food is 85%; If you change to two meals a day, and eat half of the whole day's food at each meal, the protein digestion and absorption rate is only 75%. Therefore, according to the living habits of our people, generally speaking, three meals a day is still more reasonable. At the same time, it should be noted that the interval between meals should be appropriate, as too long the interval will cause high hunger and affect people's labor and work efficiency.

Because human beings, as mammals, are physiologically destined to obtain the energy needed by their bodies only by eating. If you want to survive, you have to eat.

Physiological needs. 1.Human beings need to consume energy to move.

2.The theorem of conservation of energy tells us that what you consume in your activities must be replenished by eating to form a balance.

Hello, people eat every day because they eat nutrients to sustain their lives. Essential nutrients can be divided into six categories: protein, carbohydrates, fats, inorganic salts and trace elements, vitamins, and water. Proteins, fats, and sugars all produce energy that sustains life and is needed to carry out daily tasks.

The operation of all things in the world needs energy, whether it is the movement of a stone, the growth of a tree, or even the thinking of human beings, which is inseparable from the shadow of energy transformation. Therefore, it is very important for humans to obtain energy from food. Human eating can also supplement various vitamins and trace elements needed for growth and development, and there are some amino acids that humans cannot synthesize by themselves, so they can only be obtained from food.

Because human beings survive by eating, if they don't eat, they can only live for a week.

Because human beings are consuming energy all the time, they need to eat to replenish their strength.

Because humans cannot photosynthesize like plants to produce energy for their own use, they can only obtain energy by eating food.

If you don't eat, then if you don't eat a lot, if you don't eat a lot, I think it will definitely not work.

The reason why humans eat meat is because meat is rich in protein, animal fat, iron, zinc, vitamin B12 and other nutrients, which play a vital role in human growth and development, immunity improvement and organ health. In addition, humans have been hunting and gathering food since prehistoric times, and eating meat has become an important way for humans to maintain their health and survive. Although the development of modern science and technology has made people rely more on growing crops for protein and nutrition, meat is still a necessary supplement in some special circumstances, such as unemployment, poor natural environment or cultural traditions.

At the same time, with the continuous enhancement of people's awareness of environmental protection and the rise of vegetarianism, more and more people choose to eat only plant-based foods, which has brought some changes to meat consumption.

Humans have always been omnivores, and eating meat is our natural need and traditional habit. Meat is rich in protein, essential amino acids, iron, zinc, vitamin B and other nutrients, which can provide the energy needed by the human body, maintain good health and promote growth and development. In addition, meat is not only nutritious but also tastes beautiful and can increase appetite and enjoyment.

However, in modern society, people pay more attention to healthy diet and animal welfare, so more and more people have chosen to eat vegetarian or less meat, and have begun to look for other ** nutrients.