ANATOMY

Detailed explanation-1: -Tongue is a muscular organ present in the buccal cavity. It helps in mixing the food with saliva during chewing and helps in swallowing it.

Detailed explanation-2: -Food is masticated by teeth and moistened by saliva secreted from the (b) salivary glands. Enzymes in the saliva begin to digest starches and fats. With the help of the tongue, the resulting bolus is moved into the esophagus by swallowing. The extensive chemical process of digestion begins in the mouth.

Detailed explanation-3: -The tongue assists in moving the food around in the mouth and coating the food with saliva. It also helps in swallowing and speech.

Detailed explanation-4: -Hint: Saliva is enzymatic in nature and helps in digestion of food. The oral cavity, or mouth, is the entry point of food into the digestive system.