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Ductless Gland (Noun)

Any of the glands of the endocrine system that secrete hormones directly into the bloodstream.

Nouns denoting body parts.

The pancreas is a ductless gland located behind the stomach that secretes insulin and glucagon hormones.
The pituitary gland is often referred to as the master ductless gland, regulating the function of other endocrine glands.
Ductless glands such as the thyroid and adrenal glands are essential for maintaining various bodily functions, including metabolism and electrolyte balance.
The hypothalamus is a ductless gland that releases hormones controlling hunger, thirst, and body temperature, among other functions.
In humans, the pineal gland is a small ductless gland located in the brain that secretes melatonin, influencing sleep and wake cycles.