Sisäerityselimet

Sisäerityselimet, also known as endocrine glands, are a crucial part of the endocrine system responsible for producing and secreting hormones directly into the bloodstream. These hormones act as chemical messengers, traveling throughout the body to regulate a wide range of physiological processes. The endocrine system works in conjunction with the nervous system to maintain homeostasis, the body's stable internal environment.

Major sisäerityselimet include the pituitary gland, often called the "master gland," which controls many other endocrine glands. The thyroid gland, located in the neck, produces hormones that regulate metabolism. The adrenal glands, situated atop the kidneys, secrete hormones like adrenaline, involved in the stress response, and cortisol, which influences metabolism and immune function. The pancreas has both exocrine and endocrine functions; its endocrine portion produces insulin and glucagon, essential for blood sugar regulation. The gonads, testes in males and ovaries in females, produce sex hormones that are vital for reproduction and the development of secondary sexual characteristics. Other sisäerityselimet include the parathyroid glands, pineal gland, and thymus.

The hormones produced by these organs influence everything from growth and development, mood and sleep, to metabolism, reproduction, and the body's response to stress and injury. Dysfunction of sisäerityselimet can lead to various hormonal imbalances and associated medical conditions.