Completar frases SciencesVersión en línea Nutrition 1 por Irene Toribio 1 The first part of occurs in the . The teeth , chew and the food into . At the same time the glands a known as . After has been chewed and mixed with in the , it enters the known as . It links the throat with the . The oesophagus is surrounded by a ring of that can and at different times to the slowly towards the . This is known as .
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