内分泌腺是指没有导管、其分泌物(即激素)直接进入腺体的毛细血管,由血液循环运送到全身各处去调节生物体生命活动的腺体,如垂体、甲状腺。由于它们的分泌物不像外分泌腺的分泌物那样可以在体外直接收集,所以研究内分泌腺及其分泌激素的功能只能采用间接的方法。现将几种常用方法介 Endocrine glands are glands such as the pituitary gland and thyroid gland, which have no capillaries, their secretions (ie, hormones) that directly enter the gland’s capillaries, and are transported by the blood circulation throughout the body to regulate the life activities of organisms. Because their secretions are not collected directly in vitro as exocrine gland secretions, the ability to study endocrine glands and their secretory hormones can only be indirect. Now we will introduce several common methods