### pressure:

Hydrostatic pressure
* Some hydrostatic pressure decreases capillary filtration
  - provides forces
* can cause or induce retaining wall failure, or at least damage.
* decreases swelling.
* forces the water through gaps or cracks in walls and footings.
* function of gravity.
* increases as water gets deeper
  - the amount of gas that can remain in solution
* influences physiology.
* is regulated by constriction or dilation of afferent or efferent arterioles
  - the force exerted against a surface by a volume of water
* is the pressure of the liquid related to the height of a liquid-filled column
  - water in the fluid against the blood vessel walls
  - pressures exerted by a column of water surrounding an organism
* offers a form of massage that is soothing as well as healing.
* stimulates synthesis of elastin in cultured optic nerve astrocytes.

Immense pressure
* Most immense pressure is exerted by dense gases
  - hot gases
* Some immense pressure is caused by fusion
  - helium fusion
  - intense fusion

Increased pressure
* allows oxygen to get into tissues better.
* can also force the brain downward onto the brainstem
  - cause vomiting and seizures
  - damage the optic nerve, which is the eye s highway to the brain
* increases the solubility of gases in liquids.

Indirect pressure
* can cause damage to the extremity due to inadequate blood flow.
* is used in addition to direct pressure and elevation.

Internal pressure
* Some internal pressure is generated by contraction
  - muscle contraction
* causes a lot more moisture to reach the surface.
* refers to the problems societies faced as a result of their own organization.

Intracranial pressure
* changes in craniosynostotic rabbits.
* is measured in two ways.

Intramuscular pressure
* reduces blood flow and muscle becomes oxygen depleted.
* varies with depth.

Intraocular pressure
* can vary on an individual basis.
* is normal to palpation

Light pressure
* detects low frequency sounds.
* is applied on the lower second molar
  - equal to the power of the light beam divided by c , the speed of light
  - the force transferred by sunlight onto the sails

Lithostatic pressure
* drops as magma rises and it begins to boil.
* indices a stress in rocks.

### pressure:

Low pressure
* Most low pressure causes wind
  - produces cloudy weather
* Some low pressure causes air
  - creates wind
  - is caused by weather
  - occurs during dehydration
* acts like a vacuum, creating higher waves and raising the sea level.
* develops over the ocean
  - when air rises
* die casting uses a die which is filled from a pressurised crucible underneath.
* drops reduce heat loss, and increase efficiency.
* has effects.
* leads to unstable air conditions.
* occurs by air moving counterclockwise and converging on a center location.
  - wet weather
* pulls in air, causing precipitation.
* reduces gas mileage and the life of the tire.
* seems to be a stimulus for egg laying.
* tend to result in fewer small droplets.
* tends to allow air to rise and leads to better chances of clouds and precipitation.

Lower pressure
* increases coaguability factors in the blood
  - heat which can result in tire damage
* indicates weather.

Negative pressure
* acts to pull air into the furnace.
* allows air to flow from the surrounding areas into the laboratory.
* builds up in the middle ear from eustachian tube dysfunction.
* drives expansion.
* is the same as tension.
* makes it possible to suck contaminants into the system.
* respirators filter air through a fiber or carbon media as the wearer inhales.
* results from the opposing elastic forces of chest wall and lung
  - in forces

Normal pressure
* has a pore pressure gradient equal to that of a water column.
* hydrocephalus enlarges the ventricles without increasing pressure in the brain.

Overpressure
* control how hydrocarbons migrate and how they are trapped.
* is pressure