II. Ознакомительное чтение (45 мин). Направлено на закрепление лексики по изучаемой профессиональной теме (компетенции ОК-5).
Задание 1. Read and translate the text.
metabolic activity – обмен веществ, процесс метаболизма
solid substances – твердые вещества
to be bounded by – быть ограниченным
to be divided into – подразделяться на
to dissolve – растворять
to recognize – различать, определять
to stimulate – стимулировать
vestibule – преддверие, передняя часть
The mouth is a part of the digestive system. There are teeth, tongue, and salivary glands in the mouth. The cavity of the mouth is divided into two portions: the vestibule and the cavity proper. The vestibule of the mouth is a space bounded by the lips and cheeks. The lips and cheeks contain the mimic muscles. The oral cavity is bounded by the hard and soft palates. The hard palate separates the oral cavity from the nasal cavity. The mucous membrane covers the lips, and cheeks to the alveolar processes of the jaws. In the mouth the food is ground by the teeth and mixed with water, mucus and other secretions of the salivary glands. Saliva has a direct influence on the teeth and provides an optimal level of metabolic activity in the body. It consists of 99.5 % water and 0.5 % total solids. Saliva dissolves some of the solid substances so that they are brought in contact with taste buds which stimulate appetite. Moistening food with saliva enables to facilitate swallowing.
There are many salivary glands in the mouth. Three principal pairs are recognized: sublingual, submaxillary, and parotids. The salivary glands regulate the water supply of the body.
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