What type of gland is the parathyroid?

The parathyroid gland is classified as an endocrine gland because it releases hormones directly into the bloodstream to regulate various physiological processes. Specifically, the parathyroid glands secrete parathyroid hormone (PTH), which plays a critical role in maintaining calcium homeostasis in the body.

Endocrine glands, such as the parathyroid, differ from exocrine glands, which release substances through ducts to an epithelial surface, like sweat or salivary glands. The functions of endocrine glands are crucial in regulating metabolism, growth, and other vital bodily functions by producing hormones that circulate throughout the body.

In summary, the parathyroid's direct hormonal release into the bloodstream for systemic effect clearly identifies it as an endocrine gland, making the answer to the question valid and accurate.