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The human brain is estimated to have billions of these connections, according to some researches, about 100 billion.
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The nephron forms the basic functional unit of the kidney and comprises of various parts as shown in the picture.
Urine is formed by the process of ultrafiltration, and collected in the proximal tubule, from where it passes to the loop of Henle, the distal tubule and the collecting ducts, undergoing the processes of reabsorption and secretion to form the urine that is ultimately passed out. The concentration of urine so formed is governed by the water and elecrolyte balance of the body, and the required concentration is achieved by the processes mentioned above in the nephron
Answer:
Rh+ blood can be given only once to a non-sensitized person who is Rh- because it develops antibodies and after one exposure blood will be rejected. If an Rh- person is sensitive to Rh+ blood and receives a transfusion of Rh+ blood, it is likely that the donors cells will be rejected and the blood cells will be killed.