Human parasitology terminology explanation: It is the study of the morphological structure, life activities, survival and reproduction of parasites related to human health.

Parasite refers to lower eukaryotic organisms that are pathogenic and can serve as pathogens and vectors to spread diseases.

Parasite is characterized by any organism that lives inside or outside the body of a host or host in order to obtain nutrients or shelter needed to maintain its survival, development or reproduction. Many small animals survive in a parasitic manner, attaching themselves to larger animals than themselves.

Parasites can change the behavior of their hosts in order to better reproduce and survive. If humans are infected by some parasites that live in the brain, such as Toxoplasmosis, which lives in the brain for life, their ability to respond will be reduced.

Organs developed by parasites to adapt to parasitic life, such as Neodermis of pork tapeworm, Scolex with hooks and suckers, vestigial intestine, proglottid reproduction and leech suckers;

Or changes in the parasite's morphology, such as Candiru's body swelling after sucking blood. These two points ensure that they are successfully fixed on the human body.

A beef tapeworm can grow from a fertilized egg to 2 meters long in 10 weeks. And the infected person begins to feel nothing. A few weeks later it was discovered that the stool contained moving worm segments. Each insect segment can contain 50,000 fertilized eggs.

Intestinal parasitic roundworms have substances that inhibit trypsin and chymotrypsin in their body walls and body cavity fluid. These enzyme inhibitors in the cuticle of the insect body can protect the insect body from Role of proteases in the host intestine.