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Contraction of the rib cage causes an increase in internal lung pressure that results in the expiration of air from the lungs.
Under what internal conditions does air tend to flow into lungs?
in the lungs.
All of the rivers in Siberia tend to flow north. These rivers flow north as they being pulled to drain into the Arctic Ocean.
Anemics tend to have a lack of blood flow. They often tend to be cooler than most other people in their core body temperatures. They could also be paler in skin-tone or more easily tired doing everyday things.
In the atmosphere, to different areas of pressure
Yes it is true. When evaluating projects using internal rate of return projects having higher early year cash flows tend to be preferred at higher discount rates.
Not necessarily, but in general, yes.
Their skeletons tend to be on the outside
Men generally have larger lung function because they tend to be more active then women, although it varies extremely between people.
Because they have internal resistance. Current flow through this internal resistance produces heat, just like current flow through ordinary resistors does. The current can be from use of the battery or charging the battery (if it is rechargeable). Usually the internal resistance of a battery increases with age, meaning older batteries tend to run hotter than fresh ones.
Gene flow tends to reduce diffences between populations.