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Structures of the Endocrine System

Structures of the Endocrine System

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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Several hormones are necessary for controlling bone growth and maintaining the bone matrix. The pituitary gland secretes growth hormone (GH), which, as its name implies, controls bone growth. This happens in several ways: first, it triggers chondrocyte...

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.

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 every...

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.
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The Functions of the Skeletal System

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The most apparent functions of the skeletal system are support, protection, and movement. However, bone tissue also performs several other critical metabolic functions. For one, the bone matrix acts as a reservoir for a number of minerals important to the functioning of the body, especially calcium and phosphorus. These minerals, present in the bone tissue, can be released back into the bloodstream when required. Calcium ions, for example, are essential for muscle contractions and controlling...

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Culture of Murine Embryonic Metatarsals: A Physiological Model of Endochondral Ossification

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Bone as an endocrine organ.

Seiji Fukumoto¹, T John Martin

¹Division of Nephrology & Endocrinology, Department of Medicine, University of Tokyo Hospital, 7-3-1, Hongo, Bunkyo-ku, Tokyo 113-8655, Japan.

Trends in Endocrinology and Metabolism: TEM

|June 24, 2009

Summary

This summary is machine-generated.

The skeleton is an endocrine organ, producing hormones like fibroblast growth factor 23 (FGF23) and osteocalcin. These bone-derived hormones regulate metabolism, impacting phosphorus, vitamin D, insulin, and glucose utilization.

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Area of Science:

Endocrinology
Bone Biology
Metabolic Regulation

Background:

Bone traditionally viewed as target for systemic hormones.
Emerging evidence reveals bone's intrinsic endocrine functions.

Purpose of the Study:

To review recent findings on bone-derived hormones.
To highlight the skeleton's role as an endocrine organ.

Main Methods:

Review of recent scientific literature.
Analysis of mouse genetics studies.

Main Results:

Osteocytes produce fibroblast growth factor 23 (FGF23), regulating kidney function and phosphorus excretion.
Osteoblasts produce osteocalcin, enhancing pancreatic insulin secretion and peripheral glucose utilization.
Osteocalcin improves insulin sensitivity and reduces visceral fat.

Conclusions:

The skeleton actively participates in systemic hormonal regulation.
Bone-derived hormones play critical roles in calcium, phosphorus, and glucose metabolism.