Name the primary embryonic cell layer from which heart is derived.

Explanation

To answer the question "Name the primary embryonic cell layer from which the heart is derived," we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Concept of Germ Layers**:
- Human beings are triploblastic, meaning they have three primary embryonic cell layers: endoderm, mesoderm, and ectoderm.

2. **Identify the Germ Layers**:
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