In essence, backlinks to your website are a signal to search engines that others vouch for your content. If many sites link to the same webpage or website, search engines can infer that content is worth linking to, and therefore also worth surfacing on a SERP.
Blood disorders can affect any of the three main components of blood: 1  Red blood cells, which carry oxygen to the body's tissues. 2  White blood cells, which fight infections. 3  Platelets, which help blood to clot.
Blood clots can also cause problems in the veins and other parts of the vascular system. Blood clots can block veins and increase the pressure on the vein walls. If the walls stretch or become weak it can prevent the valve from closing properly.