A bacterium is smaller than a virus, and is the smallest known infectious organism.

Carbon dioxide exchanged for oxygen in the alveolus in the lungs is an example of:

A) internal respiration. B) anatomic ventilation. C) external respiration. D) oxyhemoglobin exchange.

For the following questions, use an ICD-9-CM code book and select the appropriate code(s) for the diagnostic phrases given

Fibrosis of pericardium