Parasitology is one of the branches of life science, and it basically deals with the dependence of living organisms in order to secure all their requirements, temporarily or permanently, on other living organisms that play the role of host for the first... Thus, parasitology studies the relationships between parasites and their hosts with their various adaptations. It also studies the morphological, biological, and pathological characteristics of parasites, whether of animal or plant origin: such as arthropods, worms, protozoa, fungi, and bacteria. And viruses. Parasitology has developed into a multifaceted science that includes the fields of biochemistry, medicine, immunology, pathology, and others.