Автор работы: Пользователь скрыл имя, 17 Марта 2013 в 12:54, реферат
The alimentary system (Lt. alimentum :nourishment ) includes all the body structures involved in preparing food for absorption into the body and excretion of waste products ie.
ҚАЗАҚ ҰЛТТЫҚ МЕДИЦИНА УНИВЕРСИТЕТІ
КАЗАХСКИЙ НАЦИОНАЛЬНЫЙ МЕДИЦИНСКИЙ УНИВЕРСИТЕТ ИМЕНИ С.Д.АСФЕНДИЯРОВА
Кафедра иностранных языков
Тheme : «Alimentary System.»
The alimentary system (Lt. alimentum :
The gastrointestinal system is (strictly speaking) composed of only the stomach and small and large intestines but is commonly deemed to include the oesophagus as well.
A knowledge of the normal microanatomy of the gastrointestinal system is vital to the understanding of:
Normal function of the gastrointestinal system
The main functions of the gastrointestinal system are:
Absorption of nutrients from ingested food occurs in four main phases within defined regions of the gastrointestinal tract
4. elimination of waste products
In order for food to be properly absorbed, it must be propelled smoothly from one segment to another. This occurs via:
Protection against ingested pathogens occurs as a result of
Structure of the gastrointestinal
The gastrointestinal system (or tract) is essentially a muscular tube which has the same basic structure throughout. Four layers are recognised, from inside out:
The mucosa varies greatly in the different regions of the gastrointestinal tract while the other layers are essentially the same.