Design of Healthy Diet Standard

(1) As can be seen from the figure, among the foods we eat every day, V cereal accounts for the largest proportion, and the main component of cereal is sugar (starch), which is the most important energy-supplying substance for human body; The saliva in the mouth contains salivary amylase, so the digestion of starch begins in the mouth, and the final digestive product is glucose.

(2) Gum swelling and bleeding is caused by scurvy, which is caused by the lack of vitamin C in the body. Sailors can't eat ⅳ fruits and vegetables during long-term sea voyage, which leads to vitamin C deficiency.

(3) Only the small intestine in human digestive tract contains enzymes for digesting I fat, and the digestion of fat needs the help of bile. The digestion process is as follows: fatty bile lipase glycerol+fatty acid.

(4) Teenagers in the growing period should eat a reasonable diet, and eat more foods rich in protein, calcium, phosphorus and vitamins, which are II, III and IV in the figure.

So, the answer is: (1) sugar; Oral cavity; glucose

(2)Ⅳ

(3) small intestine; Fatty bile lipase glycerol+fatty acid

(4)Ⅱ、Ⅲ、Ⅳ