……………. is a heterocrine gland.

Explanation

**Step-by-Step Solution:**

1. **Understanding Heterocrine Glands:**
- A heterocrine gland is defined as a gland that has both endocrine and exocrine functions. This means it can release hormones directly into the bloodstream (endocrine function) and also secrete substances through ducts (exocrine function).

2. **Defining Endocrine and Exocrine Glands:**
- Endocrine glands are ductless and release their secretions (hormones) directly into the blood.
- Exocrine glands have ducts and release their secretions through these ducts to specific locations.
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