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Related Concept Videos

Structures of the Endocrine System00:59

Structures of the Endocrine System

8.6K
The intricate framework of the endocrine system encompasses a diverse array of glands, with their target tissues and organs strategically distributed throughout the body. Central to this network are the endocrine glands, specialized structures that lack ducts and release hormones directly into the interstitial fluid. Notably, the hypothalamus, a vital neuroendocrine organ situated in the brain, governs neural functions and serves as a potent source of hormonal regulation. Near the hypothalamus...
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An Overview of the Endocrine System01:10

An Overview of the Endocrine System

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The endocrine system, a complex network of glands, orchestrates physiological balance within the body through the production and secretion of hormones. These hormones are chemical messengers in intercellular communication, acting as conduits between the secretory cells and distant target sites. They traverse the circulatory system by being released into the extracellular fluid, and their impact is specific to cells possessing receptors for a particular hormone.
The endocrine system collaborates...
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The Endocrine System01:29

The Endocrine System

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The endocrine system is an extensive network of glands – organs or tissues in the body that create chemicals that control many bodily functions, that secrete hormones, which are chemical messengers that play essential roles in regulating various bodily functions. These hormones are secreted into the bloodstream and travel throughout the body. They require specific receptors to convey signals to cells possessing these corresponding receptors. This complex signaling mechanism ensures that...
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What is the Endocrine System?00:46

What is the Endocrine System?

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The endocrine system sends hormones—chemical signals—through the bloodstream to target cells—the cells the hormones selectively affect. These signals are produced in endocrine cells, secreted into the extracellular fluid, and then diffuse into the blood. Eventually, they diffuse out of the blood and bind to target cells which have specialized receptors to recognize the hormones.
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Endocrine Signaling01:45

Endocrine Signaling

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Endocrine cells produce hormones to communicate with remote target cells found in other organs. The hormone reaches these distant areas using the circulatory system. This exposes the whole organism to the hormone but only those cells expressing hormone receptors or target cells are affected. Thus, endocrine signaling induces slow responses from its target cells but these effects also last longer.
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Classification of Epithelial Tissues: Glandular Epithelium01:20

Classification of Epithelial Tissues: Glandular Epithelium

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The glandular epithelium is made of one or more epithelial cells modified to synthesize and secrete chemical substances. Glandular epithelia can be classified based on cell number. Unicellular glands have individual secretory cells scattered across the epithelial monolayer. In contrast, multicellular glands consist of a hollow tubular duct attached to the cluster of secretory cells located in the deep pockets.
Multicellular glands are formed during early development when epithelial budding...
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Updated: Sep 23, 2025

Development of Organoids from Mouse Pituitary as In Vitro Model to Explore Pituitary Stem Cell Biology
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Cell Networks in Endocrine/Neuroendocrine Gland Function.

Nathalie C Guérineau1, Pauline Campos2, Paul R Le Tissier3

  • 1IGF, University of Montpellier, CNRS, INSERM, Montpellier, France.

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Summary

Endocrine gland organization, previously viewed simplistically, is now understood through 3D imaging to involve complex multicellular arrangements. These cellular networks critically regulate hormone secretion and physiological homeostasis.

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Area of Science:

  • Physiology
  • Endocrinology
  • Cell Biology

Background:

  • Endocrine and neuroendocrine systems regulate vital physiological processes like reproduction, growth, stress, and metabolism via hormone concentrations.
  • Hormone pulsatility and rhythmic changes are characteristic of these systems, particularly in pathophysiological states.
  • Traditional understanding of endocrine gland organization relies on outdated 2D histological studies.

Purpose of the Study:

  • To explore how the multicellular organization of endocrine glands influences hormone output.
  • To examine three distinct endocrine glands—adrenal medulla, anterior pituitary, and pancreas—representing varying levels of complexity.
  • To review modern methodologies for studying the spatial and temporal relationships of endocrine system components.

Main Methods:

  • Utilizing 21st-century technological advances, including in-depth 3D imaging of specific cell types.
  • Analyzing multicellular organization across different endocrine glands and species.
  • Investigating temporal and spatial relationships within endocrine systems.

Main Results:

  • Revealing diverse multicellular organizational motifs within endocrine glands that vary by species.
  • Demonstrating that organizational patterns can be modified to modulate hormone release.
  • Highlighting the functional differences in organization between the adrenal medulla, anterior pituitary, and pancreas.

Conclusions:

  • Emerging findings on network organization are crucial for understanding endocrine homeostasis.
  • Cellular organization directly impacts hormone secretion and physiological regulation.
  • Modern imaging techniques provide new insights into the complexity of endocrine gland function.