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 early civilizations of Mesopotamia and Egypt were very similar, but they were also different in some ways. Both Mesopotamia and Egypt developed their civilizations centered on rivers, but these rivers were polar opposites. Mesopotamia was between two rivers called the Tigris and Euphrates rivers. Egyptâs civilization developed around the Nile River. The Tigris and Euphrates rivers differed from the Nile River.