PATHOLOGY

Detailed explanation-1: -Protozoa are microscopic, one-celled organisms that can be free-living or parasitic in nature.

Detailed explanation-2: -Definition. Protozoa refer to a group of phyla which comprises the single-celled microscopic organisms, belonging to the kingdom Protista, while helminths refer to the parasitic worms characterized by elongated, flat or round bodies. Thus, this is the main difference between protozoa and helminths.

Detailed explanation-3: -Internal parasites reside inside the host’s body in blood or other tissues. Examples of animal parasites are Tapeworm and leech.

Detailed explanation-4: -disapproving : a person or thing that takes something from someone or something else and does not do anything to earn it or deserve it. She’s a parasite who only stays with him for the money.