Hypothalamus/Thalamus acts as a link between nervous systems and endocrine system.

Explanation

**Step-by-Step Solution:**

1. **Understanding the Systems**: Begin by defining the two systems in question: the nervous system and the endocrine system. The nervous system is responsible for coordinating body activities and transmitting signals between different body parts, while the endocrine system functions as a chemical messenger system that releases hormones directly into the bloodstream to reach target organs.

2. **Identifying the Structures**: Next, identify the structures involved: the hypothalamus and the thalamus. The thalamus serves primarily as a relay center for sensory and motor signals within the brain.

3. **Functions of the Hypothalamus**: Focus on the hypothalamus, which plays a crucial role in linking the nervous system to the endocrine system. It produces releasing hormones and inhibiting hormones that regulate the secretion of hormones from the anterior and posterior pituitary glands.

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