What is the endocrine system?
The endocrine system is a system of glands that produces and releases hormones into the bloodstream. These hormones regulate and coordinate many important body functions such as growth, metabolism, reproduction, mood, and energy balance.
Unlike the nervous system, which works through electrical impulses, the endocrine system works through chemical messengers called hormones.
The endocrine system helps in:
Controlling growth and development
Regulating metabolism and energy use
Maintaining blood sugar levels
Controlling reproduction and sexual development
Managing stress responses
Maintaining internal body balance (homeostasis)
| Gland | Main Function |
|---|---|
| Pituitary gland | Controls other endocrine glands |
| Thyroid gland | Regulates metabolism and growth |
| Adrenal glands | Help respond to stress |
| Pancreas | Controls blood sugar levels |
| Ovaries/Testes | Control reproductive functions |
Hormones are chemical substances produced by endocrine glands. They travel through the blood to target organs and control specific body activities.
Examples:
Insulin controls blood sugar
Thyroxine regulates metabolism
Adrenaline prepares the body for emergencies
The endocrine system is important because it:
Maintains coordination between organs
Supports normal body growth
Helps the body adapt to changes
Regulates many long-term body processes
Problems in the endocrine system can lead to hormonal imbalance and diseases such as diabetes or thyroid disorders.