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'''Humoral factor''' is a term used in [[medicine]] and [[biology]] to refer to any substance or element produced in one part of the body and then transported in the [[blood]] to another part of the body where it has its effects. These substances can include [[hormones]], [[enzymes]], and other [[biochemical]] substances.

== Overview ==

The term "humoral" is derived from the term "humor," which in ancient [[Greek medicine]] referred to one of the four bodily fluids (blood, yellow bile, black bile, and phlegm) that were thought to control human health and temperament. In modern medicine, the term "humoral" is used to refer to substances that are like the ancient humors in being produced in one part of the body and then transported in the blood to have effects in other parts of the body.

Humoral factors can be produced by many different types of cells and tissues, including [[endocrine glands]], [[immune cells]], and various types of [[epithelial cells]]. They can have a wide range of effects, depending on the specific type of humoral factor and the cells and tissues that it affects.

== Types of Humoral Factors ==

=== Hormones ===

[[Hormones]] are one of the most well-known types of humoral factors. They are produced by endocrine glands and then released into the blood, where they travel to other parts of the body and have effects on various cells and tissues. Examples of hormones include [[insulin]], which is produced by the [[pancreas]] and regulates blood sugar levels, and [[thyroid hormones]], which are produced by the [[thyroid gland]] and regulate metabolism.

=== Enzymes ===

Some [[enzymes]] can also act as humoral factors. These enzymes are produced by cells and then released into the blood, where they can have effects in other parts of the body. For example, the enzyme [[renin]] is produced by the kidneys and plays a key role in regulating blood pressure.

=== Biochemical Substances ===

Other types of biochemical substances can also act as humoral factors. These can include various types of [[proteins]], [[lipids]], and other molecules that are produced by cells and then transported in the blood to have effects in other parts of the body.

== See Also ==

* [[Endocrine system]]
* [[Immune system]]
* [[Blood]]

[[Category:Medicine]]
[[Category:Biology]]
[[Category:Endocrinology]]
[[Category:Immunology]]

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Humoral factor - Revision history

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