![]() ![]() Some types of cancer drugs can lower the number of white blood cells, red blood cells and platelets in your blood for some time. Doctors can then use stem cells as part of high dose chemotherapy treatment called stem cell transplant or bone marrow transplant. It is possible to collect stem cells from the bone marrow or the blood and freeze them. What is in blood?Īlthough blood looks like a red liquid, if left in a test tube it separates out into: They can then begin to grow into secondary cancers. So if some cancer cells escape into the circulation, they may stick in the liver as the blood passes through. This is because blood circulates from the bowel through the liver on its way back to the heart. ![]() For example, cancers of the colon (large bowel) often spread to the liver. The circulation can help to explain how some cancers spread to particular parts of the body. As the blood circulates through the gut ( digestive system ), it picks up digested food products and carries them to the liver where it gets stored or used. It carries oxygen, carbon dioxide and many other substances. The blood always circulates through the body in the same direction. It then passes through the left side of the heart and gets pumped back around the body. The blood passes through the right side of the heart and goes to the lungs where it gets rid of carbon dioxide and picks up more oxygen. The veins get bigger and bigger as they carry the blood back towards the heart. The capillaries connect with the smallest veins in the body. Here the blood in the capillaries gives oxygen to the cells and picks up the waste from the cells. CapillariesĬapillaries are the smallest blood vessels. As the arteries get further and further away from the heart, they get smaller and smaller. Arteries carry blood that is full of oxygen from the heart to all parts of the body. ![]()
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