The answer is endocrine glands.
There are two types of glands - endocrine and exocrine glands. Endocrine glands secrete hormones directly into the bloodstream without using a duct, while exocrine glands secrete hormones through the duct. Endocrine glands include pancreas, hypothalamus, pineal gland, pituitary gland, thyroid gland, parathyroid gland, adrenal gland, ovaries, testes.
