Final answer:
Eosinophils are a type of phagocytic leukocyte that attacks and kills parasitic cells by releasing toxic molecules.
Step-by-step explanation:
Eosinophils are phagocytic leukocytes that attack parasitic cells by releasing toxic molecules once they have attached themselves to the parasite. These leukocytes specialize in defending against large parasites such as worms. When activated, eosinophils secrete a range of highly toxic substances to kill the parasite.