Endocrine system


The endocrine system begins with glands which secrete regulatory chemicals known as hormones into the bloodstream. The bloodstream whisks the hormones to the intended target, supplying the necessary bodily function with an adequate supply of hormones. Target cell, the reception area of the appropriate reception of the hormones, give out feedback signals which explains to the endocrine glands how much hormone is necessary.

The human body contains variable glands throughout the body. Each, however, is classified either as endocrine glands or exocrine glands. Exocrine glands are responsible for the production of mucous, sweat, saliva, and other bodily excretions. The endocrine glands produce enough variants within the entire system that they are worthy of an entire system devoted specifically to their responsibilities, thus the human body has an endocrine system.


The endocrine glands secrete their product directly into the bloodstream, bypassing the need for a duct system that the exocrine glands require. Chemicals that can not be deposited into the blood are deposited into the interstitial fluid which surrounds the gland.
Endocrine system
Image: Endocrine System


To maintain homeostasis and communicate and integrate the body’s hormonal needs, the endocrine system is closely linked with the central nervous system. This communication and cooperation allows for complete function of the endocrine system and prevents overload of hormonal secretions. Electrochemical impulses are sent through neurons to indicate fluctuations of hormones, which entices the endocrine system to respond in short but intense rapid responses. The endocrine system does have however, its own response system to help the appropriate amounts of hormones reach their intended destination. This means that the endocrine system releases chemical regulators which travel throughout the body in search of the appropriate destination. These chemical regulators are able to respond with longer lasting hormonal adjustments in the areas that may require additional hormones.

In the body’s communication system, neurologically based communications are very fast, measurable in milliseconds. The endocrine system’s communication system takes much longer, even as long as several days before being able to effectively communicate the body’s needs for chemical adjustments. The hormonal response typically lasts for days, weeks, or months. The endocrine system and the central nervous system stay in constant communication in order to maintain the body’s proper chemical functions.


The cranial cavity contains three endocrine glands, located in close proximity to the brain’s structured ability to demand the release or the decline and prohibition of hormones. Hormone production in the endocrine system can be over ridden by the brain’s ability to release or restrict hormones. Likewise, the endocrine system has the ability to over rid the brain’s release or denial of hormone production. This is a simple but effective form of the body’s system of checks and balances in achieving appropriate hormonal activity. Without this ability, the brain and the endocrine system could easily produce the same hormones for the same location and the body would be overloaded with hormone production. Like wise, a hormonal excretion dysfunction of either system could lead the significant and detrimental denial of basic hormones for one particular body function.
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human anatomy Organs included in Endocrine system

Glandular structureGonadsHormones
PancreasParathyroid glandsPineal gland
Pituitary glandPituitary hormonesThymus
Thyroid gland