Hormones are chemical messengers that travel through the body and communicate regulatory messages. They tend to work slowly but have great impacts, affecting growth, metabolism, sexual function, reproduction, and mood. The major endocrine glands that produce hormones are the pituitary, pineal, thymus, thyroid, adrenal glands and pancreas, as well as the testes and ovaries.

1. Chapter 45: Hormones and the Endocrine System By: Caleb Falls

2. What are hormones ? Hormones are chemical messengers that travel through a person's body.

3. These molecules secrete into the extracellular fluid, circulate in the blood or hemolymph, and communicate regulatory messages throughout the body.

4. Hormonal Processes Hormones tend to work slowly but have great impacts on the body. There are many different processes in which hormones may affect the human body: Growth and development

5. Metabolism (how your body obtains energy from foods you consume)

6. Sexual function