1. The process in which complex food is broken down into simple, water soluble substances is called___________________________________2. Digestive tract & ____________________ together constitute the digestive system. 3 .The set of teeth that grows during infancy is called ____________________________ 4.Common passage for food & air is _____________________________ 5The pushing down of food due to rhythmic contraction & relaxation of wall of alimentary canal is called_____________________ 6 -------------- are finger like outgrowth in inner walls of small intestine. 7._________________is the part of stomach in ruminants where food is stored temporarily. 8_________ is the process of breaking of large fat molecules into smaller globule. 9___________________is the largest gland in human body. 10______________is the enzyme present in saliva which acts on starch of food.