The ABO system consists of A, B, AB, and O blood types. People with type A have antibodies in the blood against type B. People with type B have antibodies in the blood against type A. People with AB have no anti-A or anti-B antibodies.
Developmental dyslexia, or specific reading disability, is a disorder in which children with normal intelligence and sensory abilities show learning deficits for reading.
Knowledge center. Dyslexia is a specific reading disability due to a defect in the brain's processing of graphic symbols. It is a learning disability that alters the way the brain processes written material. It is typically characterized by difficulties in word recognition, spelling and decoding.People with dyslexia have problems with reading comprehension.t is a learning disability that alters the way the brain processes written material. It is typically characterized by difficulties in word recognition, spelling and decoding. People with dyslexia have problems with reading comprehension.