A part of a plant embryo that is attached to the hypocotyl. Embryo is at one end of the grain, which is rich in fat, protein, inorganic salts, B vitamins and vitamin E. Its texture is soft and tough, and it is easy to be separated from endosperm and lost during processing.

Although there are many kinds of cereals, their structures are basically similar, and they are all composed of husk, endosperm and germ, accounting for 13%- 15%, 83%-87% and 2%-3% of the total weight of cereals respectively.

The chaff is the outermost layer of grain, which is mainly composed of cellulose and hemicellulose. Contains a certain amount of protein, fat, vitamins and more inorganic salts. Aleurone layer is located between husk and endosperm, and contains more phosphorus, rich B vitamins and inorganic salts, which will be lost to bran during processing.

Extended data:

Cereals in China can be divided into cereals, including rice (indica rice, japonica rice and glutinous rice), wheat (wheat, barley, oats and rye), corn, sorghum, millet (millet), millet (millet) and buckwheat.

Beans include soybeans, broad beans, peas, mung beans, adzuki beans and kidney beans. Potatoes, including sweet potato, are also called sweet potato or sweet potato, potato, yam, taro and cassava.

Traditionally, cereals are the main food in China, and about 80% of the heat energy needed by human body is provided by cereals in protein. ?

References:

Baidu encyclopedia-cereal