Gland

A gland is a specialized group of cells or an organ that produces and releases substances for use elsewhere in the body or for elimination.

Glands can be endocrine, releasing hormones into the bloodstream or surrounding tissue, or exocrine, releasing substances through ducts or onto body surfaces.

Examples include:

QUICK FACT

Not all glands release hormones. Sebaceous and sweat glands, for example, are exocrine glands.

COMMONLY CONFUSED WITH

  • Hormone: a chemical messenger produced by certain cells or glands; not all glandular secretions are hormones.
  • Sebaceous gland: a specific type of exocrine gland that produces sebum.

SEE ALSO

Clinical & Educational Context

Discussed in Health Articles & Guides

Explore how "Gland" is covered across our evidence-based editorial guides:

2 Articles
The Hard Parts of Medicine

Do You Need Supplements? What Medical Research Says

Do you need supplements to stay healthy, or can a balanced diet provide everything your body requires? Vitamins, minerals, and...
Unstraight Lines

Blame the Hormone

Disorders involving the thyroid, adrenal glands, reproductive hormones, or other endocrine systems can produce symptoms affecting mood, energy, sleep, appetite, concentration, and physical functioning.