Answer:
Cysticercus
Step-by-step explanation:
Cysticercus is known as the larval form of tapeworm. The structure of cysticercus comprises of a sac filled with fluid. Since tapeworm is a parasite, its larva is found within the tissue of the host.
The larva of tapeworm is also harmful as a full grown adult as it causes cysticercosis in humans which causes mild abdominal symptoms and infection that causes passage of proglottids in the stool