HUMAN NUTRITION

Detailed explanation-1: -The mouth is where the digestive tract begins. Enzymes released into the mouth start the process of digestion.

Detailed explanation-2: -The alimentary canal is the long tube of organs-including the esophagus, stomach, and intestines-that runs from the mouth to the anus. An adult’s digestive tract is about 30 feet (about 9 meters) long. Digestion begins in the mouth, well before food reaches the stomach.

Detailed explanation-3: -The mouth, or oral cavity, is the first part of the digestive tract. It is adapted to receive food by ingestion, break it into small particles by mastication, and mix it with saliva.

Detailed explanation-4: -The mouth is also called the buccal cavity or the oral cavity. In the human digestive system, the mouth is the upper end, or the beginning of the alimentary canal, which leads to the pharynx and to the oesophagus. In humans, both the mouth or the buccal cavity and the nasal cavity are separated by the palate.

Detailed explanation-5: -Mechanical and chemical digestion begin in the mouth with the chewing of food and the release of saliva, which starts carbohydrate digestion.