Answer the following questions:
1. Define Endocrine Glands, Their functions and principal characteristics.
2. What is a hormone? .Describe their classification.
3. The endocrine system is composed of endocrine glands widely distribute throughout the body, these are:
The pituitary gland
Thyroid gland
Parathyroid glands
Adrenal glands
Pancreas
Gonads
Thymus
Pineal gland
4-Cite for each gland: localization, principal characteristic of the gland, hormone that produce, their function, and regulation of secretion.