The third largest desert in the world, and the largest non-polar desert is the Sahara. Situated in North Africa, the Sahara makes up parts of Algeria, Chad, Egypt, Eritrea, Libya, Mali, Mauritania, Morocco, Niger, Sudan, Tunisia, and Western Sahara. The Sahara Desert spans over 9,400,000 square kilometers across the continent, and is the world's hottest desert.
âº A donor is also someone who gives blood or who agrees to give an organ or body part to help someone else. (Definition of âdonorâ from the Cambridge Academic Content Dictionary Â© Cambridge University Press)
A universal donor is someone who can donate blood to anyone else, with a few rare exceptions. People with the O-blood type have traditionally been considered universal blood cell donors. Conversely, a universal recipient can safely take blood from anyone, again with a few exceptions. People with AB+ blood have been considered universal recipients.