Explain the formation of different systems from the germ layers in advanced vertebrates.

Explanation

### Step-by-Step Solution:

1. **Understanding Germ Layers**: Advanced vertebrates are triploblastic organisms, meaning they develop from three primary germ layers during embryonic development: ectoderm, mesoderm, and endoderm.

2. **Ectoderm Formation**: The ectoderm is the outermost layer. It gives rise to:
- The nervous system (including the brain and spinal cord).
- Epithelial tissues, which form the skin and its derivatives (like hair and nails).

...