Introduction to Human Breathing - Summary
Breathing is basically the process of moving air into and out of the lungs. The two types of human breathing are costal and diaphragmatic. They may be used individually and independently, or they may be used in combination.
From the instant of the "first breath," the lungs have a certain total volume called the total lung capacity. During quiet breathing, it amounts to about two-fifths of the total air volume exchanged.
After one exhales as much air as possible, the portion remaining in the lungs is called the residual volume.
The vital capacity of the lung is the total amount of air that can be exchanged during total filling and emptying of the lung.
The rate of respiration is the number of breathing cycles per minute.
Quiet ("tidal") breathing involves only a minimal exchange of air.
The complementary cycle provides a little extra oxygen to make up the difference.
In forced breathing, the volumes of air exchanged are much greater than in quiet breathing.
If one makes an exhalation effort but still holds the air inside the lungs, it is called Valsalva's maneuver.
If one suddenly releases the air, terminating Valsalva's maneuver, the result is a cough.
During speech or vocalization, the breathing cycles overlap. The purpose of this is to maintain a continuous outflow of air.
Log in to save your progress and obtain a certificate in Alison’s free Introduction to the Human Respiratory System online course
Sign up to save your progress and obtain a certificate in Alison’s free Introduction to the Human Respiratory System online course
Please enter you email address and we will mail you a link to reset your password.