Have you ever wondered why Mineta acts the way he does? People say it's hormones and puberty, but it's actually much more. It's because of the Endocrine system. The endocrine system is the collection of glands that produce hormones that regulate metabolism, growth and development, tissue function, sexual function, reproduction, sleep, and mood, among other things. The endocrine system is made up of the pituitary gland, thyroid gland, parathyroid glands, adrenal glands, pancreas, ovaries (in .females) and testicles (in males). It's main purpose is to release hormones into the body,