tailieunhanh - Developing skills for the toefl ibt transcript part 3

These filters mean we take in only some information, or keep what is important to know. So. any messages we create are a result of all this information that we receive and filter, from the time we are children to adults. | Developing-4Books_5 3 48 PM Page 675 is to help the body fight against infection. White blood cells clean up or eat bad things that get into our blood. Lastly are the platelets. They are necessary in the blood clotting process. For example when you cut your finger it is the platelets that go to work to stop the bleeding. If the cut is large the platelets will need some help to stop the bleeding. You may have to get stitches or use a bandage. But if the cut is small the platelets will collect to block blood from coming out of the wound. Remember they are like plates. So they make a stack. That is what forms scabs over wounds. Let s quickly review the three types of blood cells and what they do before we move on to talk about blood transfusions. Hemoglobin or red blood cells carry oxygen throughout the body Leukocytes or white blood cells fight infection. And platelets work in the blood clotting process. All three are crucial to a healthy working body. OK so now let s talk about blood transfusions and blood types. 05 Campus Life W Excuse me I saw you in class Just now. What s the easiest way to get back to my dorm I m in Kirby Hall. Don t tell me I have to walk M No you can take the shuttle. W Oh great. Where do I catch it M Just follow me. I can show you. The nearest stop is in front of the Student Union building. W Will I have to wait long M Let s see. What s the time W It s almost 3 45. M Oh then the buses are running on their afternoon schedule. The bus schedule changes at 3 00 . There aren t as many buses after 3 so you have to wait longer usually 20 to 30 minutes. Sorry to be the bearer of the bad news. W You re kidding. I ll freeze How long is the trip once I get on the bus M Oh only about 10 minutes. W It s so cold that it might be worth waiting for 30 minutes rather than walking. It would take me at least 30 minutes on foot. M IWell. it s up to you. There s the student union coffee shop right near the stop. You can keep warm in there. W Yeah I .