Why are Fasciola and Taenia called digenetic animals?

Explanation

**Step-by-Step Solution:**

1. **Definition of Digenetic Animals:**
Digenetic animals are those that complete their life cycle in two different hosts. The term "digenetic" refers to the presence of two distinct stages in the life cycle, typically involving a primary host and a secondary host.

2. **Life Cycle of Fasciola:**
- Fasciola, commonly known as the liver fluke, begins its life cycle with unembryonated eggs that are excreted by definitive hosts such as goats, sheep, or humans.
- These eggs hatch in water, and the first larval stage, called the miracidium, is released.
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