Fungal nail infections can be caused by three different types of fungus, alone or in combination. 1  Dermatophytes are a type of fungus that can grow on the skin, hair, and nails. 2  They don't invade the deeper tissues of the body. 3  The most common dermatophyte, Trichophyton rubrum, causes most cases of athlete's foot.
Negative Airflow. Negative airflow is the opposite of postive airflow its having more exhaust fans then intake fans, this is good because its always taking new air into the case, but then you have more dust because the intake is mostly coming from gaps in the case and then causing trapped air.
As the diaphragm depresses, it creates a vacuum in the lungs and air rushes in to fill it. As the diaphragm relaxes, it pushes the molecules closer together, increasing the internal pressure in the lungs. The air flows from the lungs into the lower pressure outside the body. Or in other words... Inhalation. 1  diaphragm contracts and drops. 2  lung volume gets larger, creating a negative pressure difference. 3  air rushes in.