EXPERIMENT - PULMONES CASEROS
Dos pajitas de refresco - una botella de plástico con tapón de rosca - plastilina- dos gomas elásticas - un globo verde y otros dos azules
Procedimiento
1) Corta la botella por la mitad.
2) Coloca el globo verde cubriendo la base de la botella y sujétalo en posición con una goma elástica.
3) Haz dos agujeritos en el tapón de la botella. Pasa por ellos las dos pajitas. Sujeta en el extremo inferior de cada pajita un globo azul sujetándolos con una goma. Sella los agujeros del tapón con plastilina.
4) Enrosca el tapón en la botella, con los dos globos azules dentro de ella.
5) Tira del globo verde hacia abajo. Esto reduce la presión del aire dentro de la botella. Entonces entra más aire por las pajitas para rellenar este espacio y los globos azules (tus pulmones) se hinchan.
6) Ahora empuja el globo verde hacia arriba para que el diafragma se contraiga. La presión dentro de la botella aumenta y hace que salga el aire por la pajita. Esto es lo que sucede cuando espiras.
Explicación
El modelo muestra cómo tu diafragma permite que tus pulmones respiren. La botella de plástico representa tu pecho, las pajitas son tus vías respiratorias, el globo verde representa el diafragma, y el azul son tus pulmones. Cuando el diafragma se estira y se contrae, infla y desinfla tus pulmones.
Com exemple aqui teniu un video on es veu l'experiment funcionant.
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