Patients selecting mechanical heart valve replacements are typically required to monitor their INR levels (international normalized ratio) to prevent risks of blood clotting, hemorrhage or stroke. To ease this process, home INR testing machines are now becoming more affordable and easy-to-use.
Archaeologists and historians don't know exactly how Egyptian civilization evolved. It is believed that humans started living along the Nile's banks starting in about 6,000 B.C.E. For the earliest inhabitants of the Nile Valley food was not easy to find.
The first civilization in the Fertile Crescent was discovered in Mesopotamia.As in Egypt, these fertile lands supported the development of civilization.Villages along the Tigris and Euphrates rivers had to work together.The first Sumerian cities emerged in southern Mesopotamia around3200 B.C.