endocrine gland

Examples of endocrine gland in the following topics:

• 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.
  • Endocrine glands are typically well vascularized and the cells comprising the tissue are typically rich in intracellular vacuoles or granules which store hormones prior to release.
  • The endocrine system is in contrast to the exocrine system which features ducted glands which secrete substances onto an epithelial surface for example a sweat gland.
  • The major endocrine glands include the pituitary, pineal, ovaries, testes, thyroid, hypothalamus and adrenal glands, additionally other tissues such as the kidney and liver also display secondary adrenal functions.
  • The endocrine systems found in the head and neck include the hypothalamus, pineal, pituitary and thyroid glands.

• 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.

• Transport of Hormones

  • Hormones synthesized by the endocrine glands are transported throughout the body by the bloodstream.
  • The endocrine system is a system of ductless glands that secrete hormones directly into the circulatory system to be carried long distances to other target organs regulating key body and organ functions.
  • Major endocrine glands.
  • Pineal gland 2.
  • Thyroid gland 4.

• 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 adrenal gland is triangular shaped, while the left adrenal gland is semilunar shaped.
  • Each adrenal gland has two distinct structures, the outer adrenal cortex and the inner medulla, both of which produce hormones.
  • The adrenal glands are triangular-shaped organs on top of the kidneys.

• Overview of the Parathyroid Glands

  • The parathyroid glands are small endocrine glands in the neck that produce parathyroid hormone.
  • The parathyroid glands are small, approximately the size of a grain of rice, endocrine glands in the neck that produce parathyroid hormone.
  • Humans usually have four parathyroid glands, which are usually located on the posterior surface of the thyroid gland, or, in rare cases, within the thyroid gland itself or in the chest.
  • The two parathyroid glands on each side which are positioned higher are called the superior parathyroid glands, while the lower two are called the inferior parathyroid glands.
  • The parathyroid gland in relation to the thyroid gland.

• 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 ductless 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

• Thyroid Gland

  • The thyroid gland, the largest endocrine gland, is responsible for the production of the hormones T3, T4, and calcitonin.
  • The thyroid gland, one of the largest endocrine glands in the body, is located in the neck, just below the larynx and in front of the trachea .
  • It is a butterfly-shaped gland with two lobes that are connected by the isthmus.
  • The thyroid gland produces the hormones T3 (triiodothyronine) and T4 (thyroxine).
  • The location of the thyroid gland is in the neck below the larynx and in front of the trachea; it is the largest endocrine gland in the body, producing T3, T4, and calcitonin.

• 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.

• 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.

• Control of the Pituitary Gland by the Hypothalamus

  • The pituitary gland consists of the anterior pituitary and the posterior pituitary.
  • The pituitary gland consists of two components: the anterior pituitary and the posterior pituitary, and is functionally linked to the hypothalamus by the pituitary stalk (also named the "infundibular stem", or simply the "infundibulum").
  • 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.
  • The anterior lobe of the pituitary receives hypothalamic releasing hormones from the hypothalamus which bind with receptors on endocrine cells in the anterior pituitary regulating the release of adrenal hormones into the systemic circulation.