Menstruation is the process in which the uterus sheds blood and tissue through the vagina. This is natural and healthy in girls and women of reproductive age. Western communities call this a period.
Increases heart rate, which pumps more oxygen to the brain!
It keeps records easily attainable so errors can be avoided and proved wrong if it were audited incorrectly.
They got used to it or invented something that made it easier to live in that environment
Actually many types! If we talk just about hospitals and clinics we still find a variety of types. Main type though is modern medicine based on latest research and development. Also another popular type of medicine practiced today is based on natural remedies, plants, natural products and specific physical exercise.
