endocrine glands

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en·do·crine glands

glands that have no ducts, their secretions being absorbed directly into the blood; collectively, these glands constitute the endocrine system.

en·do·crine glands

(en'dō-krin glandz) [TA]
Glands that have no ducts, their secretions being absorbed directly into the blood.
Synonym(s): ductless glands.

endocrine glands (enˑ·dō·krin glandz′),

n.pl ductless glands of the endocrine system that secrete hormones directly into the bloodstream.
Enlarge picture
Endocrine glands.

en·do·crine glands

(en'dō-krin glandz) [TA]
Glands that have no ducts, their secretions being absorbed directly into the blood.


1. secreting internally.
2. pertaining to internal secretions; hormonal.

endocrine cells
are either gathered together in specific endocrine glands or scattered diffusely through other tissue, e.g. in the walls of the gastrointestinal tract and the pancreas in which the cells are clustered together into islands.
endocrine dermatosis
skin changes accompanying many diseases of the endocrine glands such as hypothyroidism, hyperadrenocorticism and hypopituitarism.
endocrine glands
included are the pituitary, thyroid, parathyroid and adrenal glands, gonads, pancreas and paraganglia.
endocrine system
organs or groups of cells that secrete regulatory substances that are released directly into the circulation (hormone). The endocrine or hormonal system and the nervous system are the two major control systems of the body, and their functions are interrelated. Hormonal activity is mostly concerned with regulating metabolic activities by controlling the rates at which chemical reactions take place within cells, the transport of substances across the cell membrane, and activities related to growth and reproduction. The word hormone is applied to substances released by the endocrine glands that have physiological effects on target organs (which can be other endocrine glands) and tissues distant from the gland. There are, however, local hormones (autacoids) secreted at the site of the tissue being affected, for example, acetylcholine and serotonin.
endocrine tumor
adenoma or carcinoma; usually only one cell type, that of the normal tissue, but may be more than one type of cell capable of secreting more than one hormone.
References in periodicals archive ?
Effect of iron overload on function of endocrine glands in Egyptian beta thalassemia patients.
In a healthy person, the endocrine glands interact with each other in complicated ways to promote growth, maintenance, and reproduction.
Borrelia likes to destroy the body's connective tissue, and endocrine glands have a lot of connective tissue, so it is important to get antibiotics and other antimicrobials into those glands.
The ectoderm first differentiates the brain and nervous system tissue, then forms the endoderm, which produces the internal mucous membranes and a number of endocrine glands (such as the thyroid and the thymus) and exocrine glands (such as the pancreas).
Beginning with discussion of body function and the chemical composition of the body, the 20 illustrated chapters progressively address chapters including: enzymes and energy, interactions between cells and the extracellular environment, the nervous system, sensory physiology, endocrine glands, blood and circulation, cardiac output, the immune system, respiratory physiology, the digestive system, regulation of metabolism, and reproduction.
The thyroid is a gland, shaped like a butterfly, which is considered one of the largest endocrine glands in the body and rests in the middle of the lower neck.
The cells closest to the trophoblast become the endoderm, which will eventually give rise to the linings of the gastrointestinal and respiratory tracts, as well as endocrine glands.
Identify the endocrine glands and the hormones they secrete
Dioscorea is, however, very beneficial for the female reproductive system by balancing and normalizing the functions of the liver and endocrine glands.
Partly in order to disprove the rationale of organotherapy and partly driven by scientific curiosity, there was much research in the 1890s on the secretions of the so-called ductless or endocrine glands such as the thyroid, adrenals, ovaries and testicles.
The pituitary gland is mentioned here because it is a prime regulator of adrenal secretions, as well as providing regulatory functions for many other endocrine glands.
Further among crustaceans the cycles of growth and moulting are controlled by steroid hormones such as ecdysteroids secreted by paired endocrine glands the Yorgan (Lachaise et al.