Estradiol, or more precisely, 17Î²-estradiol, is a steroid and estrogen sex hormone, and the primary female sex hormone. It is named for and is important in the regulation of the estrous and menstrual female reproductive cycles.n the female, estradiol acts as a growth hormone for tissue of the reproductive organs, supporting the lining of the vagina, the cervical glands, the endometrium, and the lining of the fallopian tubes.
Ethnohistory is the study of ethnographic cultures and indigenous customs by examining historical records. It is also the study of the history of various ethnic groups that may or may not exist today. Ethnohistory uses both historical and ethnographic data as its foundation.
Ethnocentrism is judging another culture solely by the values and standards of one's own culture.Ethnocentric individuals judge other groups relative to their own ethnic group or culture, especially with concern for language, behavior, customs, and religion.These ethnic distinctions and subdivisions serve to define each ethnicity 's unique cultural identity.Ethnocentrism may be overt or subtle, and while it is considered a natural proclivity of human psychology, it has developed a generally negative connotation.hese ethnic distinctions and subdivisions serve to define each ethnicity 's unique cultural identity. Ethnocentrism may be overt or subtle, and while it is considered a natural proclivity of human psychology, it has developed a generally negative connotation.