• What is the endocrine system?
• Endocrine system function
• Glands of the endocrine system
• Endocrine system diseases

We explain what the endocrine system is and its main functions. In addition, the glands that compose it and possible diseases.

The endocrine system generates and distributes hormones through the bloodstream.

What is the endocrine system?

It is known asendocrine system or system of internal secretion glands to the set of tissues and organs of the human body (and other higher animals) responsible for the generation and distribution through the bloodstream of substances destined to the regulation of certain functions of the organism, known ashormones.

Similar to nervous system, the endocrine system operates on the basis of distant impulses, but instead of being nervous (electrical), they are chemical. These chemical signals are hormones, responsible for activating, regulating or inhibiting certain actions and processes of the body, such as growth, tissue production, metabolism or the development and functioning of the reproductive organs, among others.

This hormonal system It is made up of internal organs known as glands or endocrine organs, which generate their hormones and substances and release them into the organism, either locally (such as the glands of the skin) or internally (through the blood system). This includes organs such as the thymus or pancreas, or structures smaller in size such as the pituitary gland located in the brain.

In addition, this system is related to the nervous and digestive systems, among others, thus constituting a complex response network of the body, which, for example, in stressful, erotic or resting situations, generates various hormones to enhance the capacities of the body. body.

Endocrine system function

The pituitary gland secretes hormones to regulate homeostasis.

As mentioned before, the primary function of this system is the regulation of complex biochemical processes in the body, either in the face of a specific external stimulus, or simply as part of the life. This affects, for example, growth, development and sexual behavior, digestion, sleep and other areas of vital importance.

In general lines, the hormones released by the endocrine system can have functions of the following type:

• Stimulants They activate or initiate biochemical cycles, or stimulate certain behaviors in the body's tissues. For example, the hormone prolactin induces the production of milk in the maternal breasts.
• Inhibitory. They exercise the opposite role: they inhibit, stop, decrease the production of some substance or a certain behavior of the body tissue. For example: the hormonesomatostatin It inhibits the production of more growth hormones in the body, thus stopping body growth.
• Antagonists They regulate a body process based on stimulating or inhibiting it, or producing opposite but simultaneous effects. For example, hormones insulin Yglucagon regulate the metabolism of sugar, acting at the same time to increase or decrease its levels.
• Synergistic. Sometimes the joint presence of two hormones increases the effect of the first, that is, they enhance each other to achieve more intense effects. For example: hormoneshGH YT3 / T4 produced by the thyroid gland.
• Tropics They allow the alteration or control of other endocrine tissues, serving as a chemical messenger in the body. For example: the hormone gonadotropin triggers ovulation in women and spermatogenesis in males, when they are ready to start reproducing.

Glands of the endocrine system

The adrenal glands regulate responses to stress.

The endocrine system is made up of many endocrine glands and organs. The main ones are the following:

• Pineal gland. Also called epiphysis or conarium, it is at the base of the brain next to the insertion of the spinal cord, and is common to all vertebrates.It produces hormones responsible for sleep and circadian rhythms.
• Pituitary gland. Also known as the pituitary, it is responsible for secreting hormones necessary to regulate the homeostasis, including tropic hormones that regulate other endocrine tissues. It is located at the base of the skull, in a bony chair of the sphenoid bone.
• Thyroid gland. Located just below the Adam's apple, in the throat and above the windpipe, it is responsible for regulating metabolism and nuancing the body's sensitivity to other hormones.
• Kidney glands. Pyramidal in shape, it is found in par on the kidneys, and is responsible for regulating responses to stress, secreting hormones such as cortisol and adrenaline, which physically prepare the body for a dangerous situation.
• Scam This is a lymphoid organ (of the immune system) located in the torso, in front of the heart and behind the sternum.
• Pancreas. A larger organ, located in the abdomen, secretes enzymes digestives to contribute to the absorption of nutrients, and also hormones that regulate the metabolism of sugars (insulin and glucagon).
• Sex glands. Ovaries and testes, for women and men respectively, are the organs where reproductive cells and hormones that prepare sexual maturation during puberty are generated.
• External glands. Those located on the skin, are responsible for lubricating and keeping it fresh, also spilling hormones that fulfill social roles and protection of the epidermis.

Endocrine system diseases

Hyperthyroidism occurs when the thyroids speed up the metabolism too much.

The endocrine system can suffer from different disorders, which cause it to malfunction. They usually consist of overproduction or underproduction of hormones. Some examples are:

• Mellitus diabetes. Disease that consists of the underproduction of insulin (or production of poor quality hormones) that is unable to regulate the level of sugar in the blood.
• Hyperthyroidism The thyroid produces too many hormones and overrides the metabolism.
• Hypothyroidism The thyroid secretes very few hormones and slows down metabolism too much.
• Crushing's disease. The adrenal glands secrete dangerous excess hormones.