1) hepatic trematode cysts are on the surface of herbaceous plants growing near water bodies; hepatic fluke larvae live in a pond;
2) a person can take a blade of grass in his mouth with a cyst on it, and which with saliva can enter the human body.
3) During bathing, a person can accidentally swallow water with the larvae of the hepatic fluke that are in it.
Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.