This module explains what IPv4 broadcast packets are, when they are used, and how to customize your router's configuration for situations when the default behavior for handling IPv4 broadcast packets isn't appropriate.
The endocrine system refers to the collection of glands of an organism that secrete hormones directly into the circulatory system to be carried towards distant target organs. The major endocrine glands include the pineal gland, pituitary gland, pancreas, ovaries, testes, thyroid gland, parathyroid gland, hypothalamus, and adrenal glands. The endocrine system is in contrast to the exocrine system, which secretes its hormones to the outside of the body using ducts.
1 The pituitary, pineal and parathyroid glands are neuroendocrine glands. 2  The thyroid gland is not a neuroendocrine gland, but it contains scattered neuroendocrine cells known as C cells. 3  The adrenal glands are made up of a non-neuroendocrine area called the cortex, and a central neuroendocrine gland called the medulla. Neuroendocrine cells in the digestive system regulate intestinal movements and the release of digestive enzymes. 2  Neuroendocrine cells in the respiratory system are believed to play a role in the developmental stages of the respiratory organs. 3  They also regulate respiratory function.