Completar frases The respiratory system Versión en línea En esta actividad los estudiantes van a repasar las generalidades del sistema respiratorio por andrea salamanca 1 pulmonary involuntary blood thorax lungs respiratory oxygen carbon cells gas oxygen cell dioxide energy breathing carbon dioxide exchang airways nutrients waste exchange The system is and automatic . Since our birth , you have been all the time thinking about it . Through respiration our body takes in from the air . Oxygen is transported in the to all the cells . In the , it is used to generate from . Finally , the is eliminated as . Respiration is the process of gas between and . The respiratory system consists of the and the . The lungs are organs located on each side of the and are responsible for
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