Fill in the Blanks Fill in the Blanks: Lung ParasitesOnline version Test your knowledge on lung parasites and their effects on human health! by nataliay 1 sputum cercariae lungs water miracidia duodenum Eggs metacercariae infective snail feces are released through the or of the infected person ? fall into ? hatch into ? swim and penetrate the body of a ? develop into ? enter the gills or muscles of a crab ? form cysts ? become ? ingested by humans ? metacercariae excyst in the ? penetrate the intestinal wall ? migrate to the peritoneal cavity ? reach the ? become encapsulated and develop into adult worm s