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在人体内有一些专门分泌某些化学物质的器官和组织,医学上把它们称为“腺体”。腺体所分泌的物质如果是通过一定的管道排出体外,则称为“外分泌腺”,如汗腺、唾液腺等;如果腺体分泌的物质不经过管道排出人体,而是直接进入血液的话,就称为“内分泌腺”。医学上把内分泌腺所分泌的物质统称为“激素”。内分泌系统是由内分泌器官和内分泌组织组成的。所谓内分泌器官,就是指结构上独立存在、而且用人的肉眼可以看见的内分泌腺,比如甲状腺、肾上腺、脑垂体、胰岛、睾丸、卵巢、松果体等;内分泌组织则是指分散存在于其它组织和器官中的内分泌细胞团块,如胎盘的细胞、下丘脑的神经细胞等。内分泌系统是神经系统以外的另一种重要调节系统,它的主要功能是调节人体的新陈代谢、生长发育和对外界环境的适应性。内分泌功能过高或过低,都可以引起人体生理功能的紊乱,造
In the human body there are some specialized organs and tissues that secrete certain chemicals, which are medically referred to as “glands.” Glands secreted substances if it is excreted through certain pipelines, then called “exocrine gland”, such as sweat glands, salivary glands, etc .; if the secretion of glands without excretion through the body, but directly into the blood, it is called As “endocrine gland.” Medically endocrine secretions of the material collectively referred to as “hormones.” Endocrine system is composed of endocrine organs and endocrine tissue. The so-called endocrine organs, refers to the structural existence of an independent, but also with the naked eye can see the endocrine glands, such as the thyroid, adrenal, pituitary, islets, testicles, ovaries, pineal gland, etc .; endocrine tissue refers to the dispersion exists in other tissues And organs in the endocrine cell mass, such as placental cells, hypothalamic nerve cells and so on. Endocrine system is another important regulatory system outside the nervous system, its main function is to regulate the body’s metabolism, growth and development and adaptation to the external environment. Endocrine function is too high or too low, can cause disorders in human physiological function, made