Anemia - A condition in which there is a deficit in the number of healthy red blood cells in the blood, resulting in fatigue and feelings of weakness.⏎
Bacteria - A large group of unicellular microorganisms that lack a cell nucleus. Some bacteria are pathogenic and harmful to humans, some have no effect at all on humans, and some are beneficial.⏎
Bronchial Tubes - Large tubes that carry air into smaller branches of the lungs after the air has passed through the mouth, nasal passages, and windpipe.⏎
Cell Membrane - A semipermeable barrier that separates the interior of a cell from the external environment.⏎
Biological Agent (Terrorism) - A bacterium, virus, or other biological toxin used in bioterrorism or biological warfare.⏎