MEDICAL
LUNGS
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
expanding with air
|
|
|
shrinking-pushing air out
|
|
|
Either A or B
|
|
|
None of the above
|
Detailed explanation-1: -When you breathe in, or inhale, your diaphragm contracts and moves downward. This increases the space in your chest cavity, and your lungs expand into it. The muscles between your ribs also help enlarge the chest cavity. They contract to pull your rib cage both upward and outward when you inhale.
Detailed explanation-2: -The contraction of the diaphragm increases the volume of the lungs, decreasing the pressure relative to the air outside the body. Explanation: Increasing the volume of a container (in this case, the lungs) while keeping the contents (air molecules) the same will decrease the pressure.
Detailed explanation-3: -They bring oxygen into our bodies (called inspiration, or inhalation) and send carbon dioxide out (called expiration, or exhalation). This exchange of oxygen and carbon dioxide is called respiration.
Detailed explanation-4: -During exhalation, the ribs moves down and inward and the diaphragm moves up. This movement increases the space in our chest cavity and the air is pushed out.