Adrenal cortex is ectodermal/mesodermal in origin.

Explanation

**Step-by-Step Text Solution:**

1. **Understanding Germ Layers**: The human body is developed from three primary germ layers: ectoderm, mesoderm, and endoderm. Each layer has distinct roles in the formation of various tissues and organs.

2. **Identifying the Germ Layers**:
- **Endoderm**: This layer forms the inner organs, such as the gastrointestinal tract and respiratory system.
- **Mesoderm**: This layer is responsible for forming structures such as muscles, bones, blood, and connective tissues.
- **Ectoderm**: This outer layer gives rise to the central nervous system, skin, and other external structures.
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