Food refers to substances that can meet the normal physiological and biochemical energy needs of the body and extend the normal life span. For the human body, the substance that can meet the needs of normal life activities and prolong life is called food.
Food is usually composed of carbohydrates, fats, proteins and water, which can provide nutrition or pleasure for human beings or organisms by eating or drinking. Food may come from plants, animals or other organisms, such as fungi, or fermented products such as alcohol. Human beings obtain food in many different ways, such as collecting, farming, animal husbandry, hunting, fishing and hunting.
It is generally believed that the digestible substance for human or animal consumption is called food. According to the definition of the experts, the food refers to the substance that can meet the normal physiological and biochemical needs of the body and extend the normal life span. For the human body, the substance that can meet the needs of normal life activities and prolong life is called food.
General food definition: refers to the intoxicated substances that can be eaten and digested and absorbed to form the energy needed by the body to supply activities or regulate physiological functions.
The emergence of agriculture is the origin of human civilization. Previously, people depended on hunting and gathering for food, and their lives depended on how much wild plants and animals provided. As ancestors around the world have gradually observed and familiarized themselves with the growth laws of some plants and gradually learned how to cultivate crops on the basis of collecting economy and long-term living practice. Due to regional economic development differences, there are three major early farming centers in the world, West Asia, East Asia and Central and South America. Zagros Mountains in West Asia, southern Asia Minor Peninsula, Jordan, Palestine and Lebanon along the Eastern Mediterranean are the earliest agricultural origins in the world. They are also the origins of barley, wheat and lentils. Rice was cultivated in ancient India around 4500 B.C. and beans were planted in northern Thailand around 7000 B.C. Categories, gourds, cucumber crops, Mexico, Peru and Bolivia in Central and South America are the origin of maize, beans, potatoes and other crops.
Ancient Egyptians mainly ate soybeans, lentils, garlic, radish, cabbage, cucumber and lettuce. The fruits they eat are: dates, figs, grapes, pomegranates and various melons, etc.
The emergence of agriculture and domestication of livestock meet people’s needs for food. Crop cultivation and animal breeding mean that human beings begin to replace wild food provided by nature with food produced by themselves, thus ending hunting and collecting life and creating a new era.
If the relatively primitive stage of the agricultural era is the origin of civilization, then the transformation of wild food into domesticated food is the beginning of food civilization. Civilization is the result of mankind’s response to natural challenges. The rise of agriculture and animal husbandry is the turning point for mankind to finally get rid of barbarism and move towards civilization. Crop cultivation and animal breeding were originally designed to have a certain source of food and live a stable life. Through their own production activities, human beings continuously optimize crop and animal species to supply and meet the daily needs of human activity energy. It includes vegetables, fruits and meat. Vegetables generally refer to the different parts of a plant, which can be cooked and cooked into food, and other plants (mostly herbal plants) besides grain. They can be divided into leafy vegetables, melons, beans and rhizomes. Fruit refers to the plant organs with seeds in a plant or the fruits of some plants with more water content for food. There are fresh fruits, nuts, dried fruits and so on; commonly used for family or guests. Meat and meat refer to livestock (pigs, cattle, sheep, etc.), poultry meat (chicken, duck, goose, etc.), aquatic products, fish, etc., which are subcutaneous tissues and muscles of animals, including edible parts of any animal used for food, containing high protein and fat, and a large number of calories. (Summary of Food Nutrition by Xia Shengqing et al.)