The endoskeleton in vertebrates is made up of hard, living tissues such as _________and_______.

Explanation

**Step-by-Step Solution:**

1. **Understanding Endoskeleton**: The endoskeleton is the internal skeleton found in vertebrates. It provides support and shape to the body.

2. **Identifying Components**: The endoskeleton is primarily composed of hard, living tissues.

3. **Recognizing the Main Tissues**: The two main types of hard tissues that make up the endoskeleton in vertebrates are:
- **Bones**: These are rigid structures that provide strength and support.
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