Worms can exist both freely in their environment, and be parasites of other animals and plants. Free-living worms are characterized by the presence of an elongated body shape, more pronounced sensory organs, the presence of devices for movement (especially in annelids (bristles). Parasitic worms have their own specific adaptations. For holding in or on the body of the host organism, they have special suction cups and hooks The body is covered with a protective layer that prevents them from being exposed to gastric acids.
One of the components of a person's success in our time is receiving modern high-quality education, mastering the knowledge, skills and abilities necessary for life in society. A person today needs to study almost all his life, mastering everything new and new, acquiring the necessary professional qualities.