There is also a lot of evidence that probiotics and probiotic foods can help with all sorts of digestive problems (5) This includes irritable bowel syndrome (IBS), ulcers caused by H. pylori infection, and various others (21, 22, 23, 24). For this reason, kefir may be useful if you have problems with digestion.
Bone marrow is the flexible tissue in the interior of bones. In humans, red blood cells are produced by cores of bone marrow in the heads of long bones in a process known as hematopoiesis. On average, bone marrow constitutes 4% of the total body mass of humans; in an adult weighing 65 kilograms (143 lb), bone marrow typically accounts for approximately 2.6 kilograms (5.7 lb).
Blood needs to be donated, tested, ready and available for transfusion before it's needed. THE FACTS ABOUT BLOOD. 1  Blood makes up about 7 percent of a person's weight. 2  An adult body of average weight has between 12 - 14 pints of blood. Blood makes up about 7 percent of a person's weight. 2  An adult body of average weight has between 12 - 14 pints of blood. 3  A 110-pound teenager has around 7 pints of blood. 4  A 40-pound child has around 2 to 3 pints of blood.