What is the purpose of the endocrine system?
The endocrine system is composed of ductless glands which produce hormones, the body’s chemical messengers.
Each gland produces specific hormones and Hormones control and affect many body functions and organs, as well as behaviour.
The function of the endocrine system is closely linked to that of the nervous system.
- contribute to the reproductive process
- produce and secrete hormones to regulate body activities
- maintain the body during times of stress
- all of the above
A hormone is a chemical messenger, which is secreted directly into the blood by a particular gland. Some hormones are made of protein (e.g. insulin), whilst others are steroids (adrenocorticoid hormones), glycoproteins (FSH, LH, TSH), and derivatives of single amino acids, (T4, T3).
Hormones are produced in the gland and are then transported to the area/organ they control or affect.
Endocrine glands are ductless gland which produces hormones.
Ductless means that there is no separate canal or tube to transport the hormones to the blood. Hormones travel straight into the bloodstream from the gland.
Hormones and Endocrine System
Hormones and Endocrine System affects the behaviour and function of different areas of the body and of the body overall, e.g. hormones are responsible for correct growth, changes during puberty, the menstrual cycle, pregnancy, the menopause, responses to stress and danger and the proper functioning of the kidneys and digestive system.
If too much of a hormone is produced it is known as hyper-secretion;
Too little is known as hypo-secretion.
Fill in the blanks
- Pineal Gland
- Pituitary gland
- Parathyroid and Thyroid gland
- Adrenal gland