What are the primary units of the endocrine system responsible for hormone production?

The endocrine system's primary units responsible for hormone production are glands. These specialized structures, such as the pituitary, thyroid, adrenal, and pancreas, produce and secrete hormones directly into the bloodstream. This hormonal release plays a crucial role in regulating various bodily functions, including metabolism, growth, and mood.

Glands are composed of specific cell types that have the unique function of synthesizing hormones. The organization of these cells into a gland allows for a coordinated response to internal and external stimuli. While organs, cells, and tissues can play supporting roles in the overall functionality of the endocrine system, it is the glands that are specifically designed to produce and release hormones, making them the primary units of hormone production in the endocrine system.