The appearance of nipples can vary significantly from one person to another. There is no normal nipple and no formal medical description of nipple types. Nipples may be protruding, puffy, hairy, ...

There are many different types of pulmonary function tests that may be used to provide valuable information about the lungs, as well as detect the presence of and/or monitor certain respiratory ...

Pathogens are organisms that can cause disease. The different types of pathogens and the severity of the diseases that they cause are very diverse. In this article, we look at different pathogens, how ...