A thirteen-year-old girl, who is underdeveloped andthin, has a blood disorder. She frequently experiences chest andabdominal pain, fever, and coughing, and has trouble breathing. Herteachers often spend additional time with her, explaining conceptsthat the rest of the class is familiar with, as she tires veryeasily and is able to concentrate only for short spans of time.

Identify the blood disorder that she might be sufferingfrom.

Describe in detail the symptoms of this blood disorder.

Explain the difference in the cells of this girl and a personwho does not suffer from the disorder.