(20 1 1? Binzhou shows the digestive, respiratory, circulatory and urinary processes of the human body. Please answer the following questions according to the pictures: (1) Starch in food, in

(1) Starch in food is first partially decomposed into maltose by salivary amylase in the mouth, and the stomach has no ability to digest sugar. There are many annular folds on the inner surface of the small intestine, which greatly increases the inner surface of the small intestine. Small intestine contains enzymes that digest sugar, starch and fat, which is the main place to digest food and absorb nutrition. Starch is completely digested into glucose in small intestine. The process of glucose entering the circulatory system through the digestive tract wall is called absorption.

(2) The gas exchange between the lungs and the outside world is called lung ventilation, which is realized by breathing movement. Gas always diffuses from high concentration to low concentration, and the gas exchange process between alveoli and blood is realized by gas diffusion.

(3) When the blood flows through the capillaries at the tissue cells, oxygen and nutrients in the blood enter the tissue cells and generate energy in the mitochondria of the cells through respiration to meet the needs of human life activities.

(4) The formation of urine includes two processes: filtration of the inner wall of glomerulus and renal capsule and reabsorption of renal tubules. In the figure, process B represents the filtration of the inner wall of glomerulus and renal capsule.

So the answer is: (1) glucose; Absorption; Small intestine?

(2) respiratory movement; Gas diffusion?

(3) a; oxygen

(4) filtration of the inner wall of glomerulus and renal capsule