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The digestive system Part 1 - From the oral cavity to the stomach
The digestive system is responsible for separating the nutrients and unusable materials in the food we eat.
Bioloģija
6.-12. klase
Autors: Keszthelyi Zoltán
Korektors: Horváthné Kunstár Andrea, Márton Gábor
Grafiskais dizaineris: Chounramany Sengnirane
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