Intra-alveolar means between the alveoli. Focal means within a limited area. There are both adjectives and the phrase is missing a noun. (In other words, focal intra-alveolar...what?)
lung at rest
When the diaphragm contracts, it moves downward, increasing the volume of the thoracic cavity. This leads to a decrease in intraalveolar pressure, causing air to flow in from the atmosphere to equalize the pressure, resulting in inhalation.
If intraalveolar pressure exceeds atmospheric pressure, air will flow out of the lungs due to the pressure gradient. This process is known as exhalation or expiration. It allows the lungs to get rid of carbon dioxide and regulate the levels of gases in the body.
The distance from a lens to the focal point is called the focal length.
focal length of the lens
It does not. For an explanation of "focal plane" see the question What is the focal plane?
Focal Point:The distance from the Lens to the Focal Point is called the Focal Point.
focal calcification
Focal Press was created in 1938.
Focal-JMLab was created in 1979.
The population of Focal-JMLab is 213.
The distance from the center of a mirror to the focal point is called the focal length.