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.
Quirigua is one of the smallest Mayan sites in Guatemala, but it is home to some of the best displays of monuments, including the largest block of stone ever carved by the Mayas. The tallest carved stone, or stela, measures 35 feet and weighs more than 65 tons. Uaxactun Located near Tikal, Uaxactun is one of the oldest Mayan sites with structures dating back to 330 BC. It is believed this is the primary place where the Mayans developed their calendar based on the four ruins built in alignment with the sunrise during equinoxes and solstices. Zaculeu Located in western town of Huehuetenango, Zaculeu is about a one-hour drive from Mexico. It is renowned for its use of a completely different material than other Mayan sites.