abstract biological blood body brain cancer cell division cells concept creation curdle dez pain dissection flesh graphic gross growth gruesome halloween horrible infection jelly living matter meat membrane microscopic mucous nauseating offal ooze organic organs petri dish red reflection science scientific shiny sickening texture tumour vector veins wet xymonau yellow yuck zombie apocalypse attract-prey attracted attraction carnivore carnivorous carnivorous-plants clumps clusters coloring colors colouring colours cover devour digest digested digesting display distinctive edge edges enzymes flora flowers funnel herbaceous insect-trap insects nectar-like-secretions nutrient-source nutrients operculum passive-trap perennials pitcher-plants pitchers pitfall-traps plants prey proteases rims slippery species trap unusual variations variety vegetation