There are numerous ways to understand the endocrine glands: by function, location, chakra rulership. I will include these below but I don not believe these correlations are working as well as that expressed above. Some things seem to work, yet there are also deep flaws in some parts of the categorization and in many cases it is not working in practice. One will, however, get much benefit in considering each method, and it’s likey that western astrology has something to offer in this field thru the use of the more distant planets: Pluto, Uranus & Neptune.