Pancreas is a/an heterocrine gland/ endocrine gland.

Explanation

**Step-by-Step Solution:**

1. **Definition of Pancreas**: The pancreas is a gland located in the abdomen that plays a crucial role in digestion and blood sugar regulation.

2. **Classification of Glands**: Glands in the body can be classified into two main types: endocrine and exocrine.
- **Endocrine Glands**: These are ductless glands that secrete hormones directly into the bloodstream. Examples include the thyroid gland and adrenal glands.
- **Exocrine Glands**: These glands have ducts and secrete their products into specific sites, such as the digestive tract. Examples include salivary glands and sweat glands.

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