内分泌腺知识（Knowledge of endocrine glands）.docVIP

内分泌腺知识（Knowledge of endocrine glands） Glands that are not excreted are called endocrine glands. The substances secreted by them (called hormones) go directly into the surrounding blood vessels and lymph vessels and deliver hormones from the blood and lymph to the body. Many endocrine glands are scattered throughout the body. Some endocrine glands form a single organ, such as the pituitary gland, thyroid gland, parathyroid gland, thymus gland, pineal gland and adrenal gland, and so on. Other endocrine glands are found in other organs, such as the islets of Langerhans in the pancreas, the corpus luteum in the ovary, and interstitial cells in the testis. Endocrine glands secrete various hormones on the body organs of the growth and development, functional activities, metabolism plays a very complex and very important regulatory role. The endocrine glands of the human body The endocrine glands of the human body are the pituitary gland, thyroid gland, pancreas islet, adrenal gland, parathyroid gland, thymus gland and gonad. In addition, the pineal gland and endocrine cells distributed in the gastrointestinal tract, as well as some nerve cells in the hypothalamus, also have endocrine functions. The following are some knowledge of endocrine glands and their secretion of hormones. Pituitary pituitary suspended in the base of the brain, so called the pituitary or pituitary gland. It is ovoid in size, as in pea, and is connected by a short stalk to the lower hypothalamus (also called the hypothalamus). The pituitary gland can be divided into two parts: the pituitary gland and the pituitary gland. The pituitary gland is the gland tissue, and the pituitary gland is the nerve tissue. The pituitary gland secretes growth hormone, prolactin, etc.. Growth hormone directly acts on tissue cells, can increase the volume and quantity of cells, and promote the growth of human body. The pituitary gland also secretes thyrotropin, ACTH, and gonadotropin, which are called hormones. On the on