endocrine gland
(noun)
Any of various glands that secrete hormones directly into the blood or lymph and not through a duct.
Examples of endocrine gland in the following topics:
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Glandular Epithelia
- Glandular epithelium contains glands, either exocrine or endocrine, allowing for secretory function.
- Epithelia can also be organized into clusters of cells that function as exocrine and endocrine glands.
- There are two major classifications of glands: endocrine glands and exocrine glands.
- Endocrine glands secrete their product into the extracellular space where it is rapidly taken up by the blood vascular system.
- An endocrine gland is its counterpart.
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Transport of Hormones
- Hormones synthesized by the endocrine glands are transported throughout the body by the bloodstream.
- The endocrine system is a control system of ductless glands that secrete hormones within specific organs.
- Hormones synthesized by the endocrine glands are transported throughout the body by the bloodstream.
- Major endocrine glands.
- Pineal gland 2.
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Overview of Endocrine Glands
- Endocrine glands are those glands which have no duct and release their secretions directly into the intercellular fluid or into the blood.
- Endocrine glands are those which have no duct and release their secretions directly into the intercellular fluid or into the blood.
- A collection of endocrine glands makes up the endocrine system: the pituitary (anterior and posterior lobes), thyroid, parathyroid, adrenal (cortex and medulla), pancreas and gonads.
- This is one of the largest endocrine glands in the body.
- Differentiate among the types of endocrine glands (pituitary [posterior pituitary, anterior pituitary], thyroid, parathyroid, adrenal, and pancreas) in the endocrine system
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Overview of the Endocrine System
- The endocrine system is a system of ductless glands that secrete hormones, which are chemical messengers that act at a distance.
- The endocrine system is a system of ductless glands that secrete hormones within specific organs.
- Hormones are secreted by two types of glands: exocrine glands and endocrine glands.
- In contrast, endocrine glands have no duct and release their secretions directly into the intercellular fluid or into the blood.
- The main endocrine glands are the pituitary (anterior and posterior lobes), thyroid, parathyroid, adrenal (cortex and medulla), pancreas and gonads.
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Overview of the Parathyroid Glands
- The parathyroid glands are small endocrine glands in the neck that produce parathyroid hormone.
- The parathyroid glands are small endocrine glands in the neck that produce parathyroid hormone.
- Humans usually have four parathyroid glands, which are usually located on the rear surface of the thyroid gland, or, in rare cases, within the thyroid gland itself or in the chest.
- The parathyroid glands are four or more small glands, about the size of a grain of rice, located on the posterior surface (back side) of the thyroid gland.
- The parathyroid gland in relation to the thyroid gland.
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Development of the Endocrine System
- The endocrine system is a control system of ductless glands that secrete hormones within specific organs.
- The main endocrine glands are the hypothalamus (neuro-endocrine gland), pituitary (anterior and posterior lobes), thyroid, parathyroid, adrenal (cortex and medulla), pancreas, and gonads.
- The thyroid gland is the primary endocrine gland involved in development.
- The thyroid gland is one of the largest endocrine glands in the body.
- Major endocrine glands.
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Pancreas
- The pancreas is a gland organ in the digestive and endocrine systems.
- The pancreas is a gland organ in the digestive and endocrine systems.
- As an endocrine gland, the pancreas produces several important hormones which include insulin, glucagon, somatostatin and pancreatic polypeptide.
- The pancreas is a dual-function gland, having features of both endocrine and exocrine glands.
- The pancreas as an exocrine gland helps out the digestive system.
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Overview of the Adrenal Glands
- In mammals, the adrenal glands (also known as suprarenal glands) are endocrine glands that sit atop the kidneys.
- In mammals, the adrenal glands (also known as suprarenal glands) are endocrine glands that sit atop the kidneys.
- In humans, the right suprarenal gland is triangular shaped, while the left suprarenal gland is semilunar shaped.
- In humans, the adrenal glands are found at the level of the 12th thoracic vertebra.
- The adrenal glands are triangular-shaped organs on top of the kidneys.
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Control of the Pituitary Gland by the Hypothalamus
- The pituitary gland consists of the anterior pituitary and the posterior pituitary.
- Whilst the pituitary gland is known as the 'master' endocrine gland, both of the lobes are under the control of the hypothalamus; the anterior pituitary receives its signals from the parvocellular neurons and the posterior pituitary receives its signals from magnocellular neurons.
- It allows endocrine communication between the two structures.
- Using these, the anterior pituitary is able to fulfill its function of regulating the other endocrine glands.
- Also, hypothalamic hormones stimulate the release of the respective hormone from the anterior pituitary gland.
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Histology of the Pancreas
- The pancreas is a glandular organ in the digestive system and endocrine system of vertebrates.
- It is both an endocrine gland producing several important hormones, including insulin, glucagon, somatostatin, and pancreatic polypeptide, as well as a digestive organ, secreting pancreatic juice containing digestive enzymes that assist the absorption of nutrients and the digestion in the small intestine.
- These produce hormones that underlie the endocrine functions of the pancreas.
- The pancreas is a dual-function gland, having features of both endocrine and exocrine glands.
- The capillaries of the islets are lined by layers of endocrine cells in direct contact with vessels, and most endocrine cells are in direct contact with blood vessels, either by cytoplasmic processes or by direct apposition.