These are ductless glands that produce and release hormones directly into the bloodstream. They play key roles in regulating mood, growth and development, tissue function, metabolism etc.
Part of the brain responsible for controlling certain metabolic processes and other activities related to the autonomic nervous system. It synthesizes and secretes neurohormones often called releasing hormones because they function by stimulating other endocrine glands to release hormones.
Often referred to as 'master gland' because it controls several other hormone-secreting glands including thyroid gland, adrenal gland etc., ensuring all these different systems work together smoothly.