It is an important substance in our life, and hormones are made by endocrine cells.

There are two kinds of endocrine cells in the human body:

Social groups form endocrine glands, such as pituitary gland in skull, thyroid gland in front of neck, parathyroid gland in stomach, adrenal gland, islet in scrotum, ovary and testis.

Scattered, such as gastrointestinal hormone cells in gastrointestinal mucosa and peptide hormone secretion cells in hypothalamus.

Every endocrine cell is a small workshop for producing hormones.

The concentration of hormones produced by a large number of endocrine cells has become a force to be reckoned with.

Hormones are chemicals.