 Spiders have a narrow gut that can only cope with liquid food , and have two sets of filters to keep solids out . Some spiders pump digestive enzymes from the midgut into the prey and then suck the liquified tissues of the prey into the gut , eventually leaving behind the empty husk of the prey . Others grind the prey to pulp using the fangs and the bases of the pedipalps , while flooding it with enzymes ; in these species the fangs and the bases of the pedipalps form a preoral cavity that holds the food they are processing . : 576 
