Explain the trichinella of nematoda which belongs to non chordate phyla?

The trichinella is known as trichina worm. It acts as a parasite in the small intestine of human beings. It also involves domestic animals. The females move to intestine through lymph capillaries and give birth to offspring. They affect the voluntary muscles via blood and lymph. They form a cyst wall. These cysts go into the intestine and release worms. The worms copulate and form adults. These adults survive for short time. They show sexual dimorphism. The female is longer and straight while the male is short and curved. The male also has a couple of copulatory lobes. It causes trichinosis which is accompanied by nausea, diarrhoea, abdominal and muscular pain. The man is infected by improperly cooked pork.