A blood transfusion is a safe, common procedure in which blood is given to you through an intravenous (IV) line in one of your blood vessels. Blood transfusions are done to replace blood lost during surgery or due to a serious injury. A transfusion also may be done if your body can't make blood properly because of an illness. During a blood transfusion, a small needle is used to insert an IV line into one of your blood vessels. Through this line, you receive healthy blood. The procedure usually takes 1 to 4 hours, depending on how much blood you need. Blood transfusions are very common.
1 The roots of the ancient mountain range that now lies at the bottom of the Grand Canyon were formed about 1.7 billion years ago. 2  There is then an unconformity of about 450 million year in which the rocks are missing. 3  At 1.25 billion years ago the first sedimentary layer, the Bass Formation, was laid down.
Let me introduce you to Burlingame Canyon near Walla Walla, Washington. It measures 1500 feet long, up to 120 feet deep, and 120 feet wide, winding through a hillside. A small-scale analogy to Grand Canyon it was observed to form in less than six days.In 1904 the Gardena Farming District constructed a series of irrigation canals to provide water to this normally rather arid high desert area.es, canyons can form rapidly. A good maxim to remember is that, It either takes a little water and a long time, or a lot of water and a short time.. But then, we've never seen a canyon form slowly with just a little water.