Which one develops from ectoderm?

Options

A. Liver and heart
B. Notochord and vertebral column
C. Spinal cord and brain
D. Eye and skin.

Answer

To determine which structure develops from the ectoderm, we can analyze the options provided:

1. **Liver and Heart**:
- The liver is derived from the endoderm, as it is part of the gastrointestinal tract.
- The heart is derived from the mesoderm, as it is a part of the circulatory system.

2. **Notochord and Vertebral Column**:
- The notochord is derived from the mesoderm, as it plays a role in the development of the vertebral column.
- The vertebral column itself is also derived from the mesoderm.

3. **Spinal Cord and Brain**:
- Both the spinal cord and brain are derived from the ectoderm. They develop from the neural tube, which forms from ectodermal tissue during embryonic development.

4. **Skin**:
- The skin has components derived from both ectoderm (the epidermis) and mesoderm (the dermis). However, the outer layer (epidermis) is ectodermal in origin.

Based on this analysis, the correct answer is:

**C. Spinal Cord and Brain** - both of these structures develop from the ectoderm.