382 HOW FOOD IS PREPARED FOR BODY USE 



Review Summary 



Check your knowledge of the unit by: (1) Answ ring and rechecking the 

 survey questions; (2) performing the assigned exercises; (3) checking with 

 the teacher your scores on the various tests and doing over those that you 

 missed; and finally (4) making an outline of the unit for your notebook. 



Tests on Fundamental Concepts 



In a vertical column under the heading CORRECT write numbers of all statements you 

 believe are true. In another column under INCORRECT write numbers of untrue statements. 

 Your grade = number of right answers X 4. 



I. The digestive tract of man (1) is a straight. tube extending from 

 the mouth to the anus; (2) is the structure including the glands 

 through which food passes ; (3) consists of the diaphragm, blood, and 

 muscles ; (4) may be compared, part by part, with that of the frog ; 

 (5) consists of the mouth (including teeth), pharynx, gullet, stomach, 

 and small and large intestines. 



II. A gland (6) is a collection of cells which secrete substances 

 which are of use to the body; (7) found in the stomach secretes 

 saliva; (8) found emptying into the small intestine is called the 

 pancreas ; (9) does its work by means of enzymes contained in its 

 secretion; (10) of digestion is controlled by the nerves. 



III. Digestion (11) is necessary in order to change solid food into a 

 soluble form; (12) is brought about by enzymes; (13) is principally 

 brought about in the large intestine ; (14) of fats takes place in the 

 small intestines ; (15) of starches takes place chiefly in the stomach. 



IV. The teeth (16) are composed chiefly of dentine; (17) are of no 

 value in preparing food for digestion; (18) are divided into four 

 groups on a basis of structure; (19) should be brushed frequently 

 with a gritty powder; (20) if allowed to decay, can make serious 

 trouble through focal infection at the base of the root. 



V. Absorption of food (21) is necessary if the cells are to get nourish- 

 ment ; (22) takes place largely in the stomach ; (23) is brought about 

 by the villi ; (24) takes place largely by osmosis through the cells of 

 the villi ; (25) is not necessary unless we are growing, for our cells do 

 not need food for other purposes. 



Achievement Test 



1. How would you make a comparison of the digestive tract of the 

 frog and of man and what are the parts with the functions of each? 



