Name the cavity formed in gastrula. What does it form in the embryo?

Explanation

### Step-by-Step Solution:

1. **Identify the Cavity Formed in Gastrula**:
- The cavity formed during the gastrulation stage of embryonic development is called the **archenteron**.

2. **Understand the Role of Archenteron**:
- The archenteron is also referred to as the **gastrocoel**. It plays a crucial role in the development of the embryo by determining the fate of the cells that will form various structures.

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