A gland that releases a chemical messenger, known as a hormone, directly into the bloodstream, that will affect other parts of the body. The thyroid is an endocrine gland.

Any of a number of ductless glands that release hormones directly into the blood or lymph. The secretions of some endocrine glands increase during emotional arousal.

An organ that is specialized for secretion of a hormone into the general circulation. ( More? Endocrine Notes)

(en´ doh krin) [Gr. endon: inside + krinein: to separate] • Any gland, such as the adrenal or pituitary gland of vertebrates, that secretes certain substances, especially hormones, into the body through the blood.

A gland that produces a secretion – often a hormone - and releases it directly into the bloodstream.

organs that secrete hormones in to the blood.

Gland that secrete regulatory substances directly into the circulation and not through a duct.

(EHN-do-krihn gland) One of two main categories of glands, in which the products are secreted into the extracellular space and transported by the bloodstream. Also called ductless glands.

gland that secretes one or more hormones into the blood.

any of the glands of the endocrine system that secrete hormones directly into the bloodstream

a ductless gland whose secretory products are picked up by capillaries in the region

a specialized structures that are found in different parts of the body that secrete hormones

a type of organ (such as the pancreas) that releases hormones (types of natural chemicals) into the blood or lymph nodes

The endocrine glands manufacture one or more hormones and secrete them directly into the bloodstream. Endocrine glands include the pituitary, thyroid, parathyroid, adrenal, ovary, testis, placenta and part of the pancreas.

A gland which furnishes an internal secretion, usually having an effect on another organ.

a gland that secretes directly into the bloodstream.

A group of specialized cells that release hormones into the blood. For example, the islets in the pancreas, which secrete insulin, are endocrine glands.

A gland, such as your thyroid or tests, that makes hormones.

An organ that manufactures hormones and sends them out into the bloodstream.

A gland that releases hormones that enter the blood or lymph system and travel throughout the body. Hormones, the active substance of the glands, produce effects on tissues which are remote from their place of origin.

A gland that secretes hormones directly into the blood stream.

A ductless gland, e.g., the thyroid or the pituitary glands, which produces one or more hormones which will be released into the bloodstream to be distributed body wide in order to interact with their target cells, tissues, and organs.

A ductless gland whose secretions pass directly into the lymph or blood stream. These glands produce hormones which control action and development of other parts of the body either by activation or by inhibition.

A ductless gland, such as the pituitary, thyroid, or adrenal gland, that secretes its products directly into the blood or lymph.

Any of the ductless glands, such as the thyroid or adrenal, the secretions of which pass directly into the blood stream from the cells of the gland

A gland that secretes hormones into the bloodstream.

An organ that produces hormones.

Ductless gland secreting a hormone directly into the bloodstream. Examples include adrenal, thyroid and pituitary glands.

Ductless gland; secretes hormones

one of the glands which secrete hormones into the bloodstream Humans as organisms

Group of cells that secrete into the extracellular space hormones that then diffuse into bloodstream; also called a ductless gland.

ductless glands that secrete endocrine hormones; examples include the pituitary and thyroid.