Endocrine gland

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An endocrine gland secretes a hormone (which is a signalling molecule) into the bloodstream where is travels to distant target cells where a cell response will take place. An example of an endocrine gland is the pancreatic islets where insulin is secreted into the bloodstream from the beta cells.[1]

References

  1. Becker, W.M. et al. 2004. Physiology. 5th ed. St. Louis: Mosby. pp.720-721.