Hirudin hirudin. Hirudin Hirudin is a naturally occurring peptide in the salivary glands of blood-sucking leeches (such as "Hirudo medicinalis") that has a blood anticoagulant property. This is fundamental for the leeches’ alimentary habit of hematophagy, since it keeps the blood flowing after the initial phlebotomy performed by the worm on the host’s skin. During his years in Birmingham and Edinburgh, John Berry Haycraft had been actively engaged in research and published papers on the coagulation of blood, and in 1884, he discovered that the leech secreted a powerful anticoagulant, which he named hirudin, although it was not isolated until the
Creatures 2 near the oceans. Scattered throughout the world are various seed launchers, which can be used to replenish stocks if any life-forms become extinct. Albia also has four seasons: Spring, Summer, Winter and Autumn, and boasts its very own climate, with weather such as snow mainly occurring during the colder months, and rain mostly during the Spring. The game also has an on-screen thermometer, allowing the player to monitor Albia's temperature at all times. Creatures 2's release was widely anticipated. It is likely that around 450,000 copies of the original Creatures had been sold by the time the game was released,