english: It senses it by chemical means and very importantly by mechanical means, because it has to move the food -- it has to mix all the various elements which we need for digestion.
non_english: Jedlo cíti chemicky, ale aj mechanicky, čo je veľmi dôležité, pretože musí jedlom hýbať – musí zmiešať rôzne prvky, ktoré potrebujeme pre trávenie.