Albumin is a protein made by the liver. It makes up about 60% of the total protein in the blood and plays many roles. It keeps fluid from leaking out of blood vessels; nourishes tissues; and transports hormones, vitamins, drugs, and ions like calcium throughout the body.
The Mayan and other Mesoamerican cultures used a vigesimal number system based on base 20 (and, to some extent, base 5), probably originally developed from counting on fingers and toes. The numerals consisted of only three symbols: zero, represented as a shell shape; one, a dot; and five, a bar.he Mayan civilisation had settled in the region of Central America from about 2000 BCE, although the so-called Classic Period stretches from about 250 CE to 900 CE.
A Maya month or uinal consists of 20 solar days or kins. The 260-day sacred year or tzolkin consists of 13 months of 20 days, while the 365-day vague year or haab, consists of 18 months of 20 days, called the tun, followed by an intercalary month of five days called the uayeb.Longer cycles can be incorporated in the Maya calendar.he Maya actually used two calendars, a sacred year of 260 days and a vague year of 365 days. Along with other Mesoamerican peoples, the Maya use the sacred year for religious purposes and to name children, for example. The vague year is used for such things as planting crops.