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.
The modern sanitary napkins have made womenâs life much easier but before they were invented, women used sand, wood, paper, grass and other things to control their menstrual bleed. Hereâs how they used them. 1. Sanitary belts. When there were no sanitary pads, sanitary belts were used to soak up the period blood. The belts were basically diapers with elastic belts on which cotton pads were to be clipped and then used. They were invented in the 1800s and they stayed popular till 1970s. 2. Sand. Chinese women literally used sand to combat their menstrual bleed. They used to make period pads by putting sand in a cloth and wrapping it tightly.