Different types of hormones are secreted in the body, with different biological roles and functions. A hormone (from the Greek participle âá½ÏÎ¼á¿¶Î½â) is any member of a class of signaling molecules produced by glands in multicellular organisms that are transported by the circulatory system to target distant organs to regulate physiology and behaviour.
exists and is an alternate of . A simple reason for the invention of the stapler would be to ease our work and keeping all the documents together. It was invented when a lot of paperwork started taking pace and need to keep them together increased. King Louis XV invented the first stapler in 18th century.
AD 105. The birth of paper, as we know it today, took place under the Chinese Han Dynasty in AD 105. Ts'ai Lun, a court official, invented a papermaking process which primarily used rags (textile waste) as the raw material with which to make paper. Chinese papermakers subsequently developed a number of specialities such as sized (paper with special surface properties), coated and dyed paper.