ЛЕКЦИЯ № 41. The act of swallowing

The act of swallowing is divided into three stages. The first stage is under voluntary control. The food which has been transformed into a soft, mass by [...]

ЛЕКЦИЯ № 39. The progess of digestion

The process of digestion begins when food is taken into the mouth. Chewing Ы-еаго the food into smaller pieces, thereby exposing more surfaces to [...]

ЛЕКЦИЯ № 38. The digestive tract structure

The gastrointestinal tract and associated organs are collectively called the digestive system. This system is responsible for receiving food and [...]