The digestive juice secreted by the organs shown in the number one is called bile, and the way it digests fat belongs to

(1) In the figure, ① is salivary gland, ④ is liver, and ⑥ is pancreas, all of which belong to digestive glands in the digestive system.

(2) The organ indicated by the symbol ④ in the figure is the liver, and the digestive juice it secretes is bile. Bile contains no digestive enzymes, and its function is to emulsify fat into many droplets, so the way it digests fat belongs to physical digestion.

(3) In the digestive tract, the small intestine is the main part for digesting food and absorbing nutrition, so the food people eat every day is mainly digested and absorbed in the small intestine, and then transported to the whole body with blood circulation.

(4) The digestive tract can be divided into oral cavity, pharynx, esophagus, stomach, small intestine, large intestine and anus, so the order of food entering and leaving the digestive tract is oral cavity → pharynx → esophagus → stomach → small intestine → large intestine → anus.

So the answer is:

(1) digestive gland;

(2) bile; Physics;

(3)⑦ small intestine;

(4)②③⑤⑦⑧⑨