MICROANATOMY

ENDOCRINE ORGANS AND RESPIRATORY SYSTEM

RESPIRATORY SYSTEM

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
When we breathe OUT, our diaphragm rises. The lungs ____, and the space inside becomes smaller. So, air is forced out of the lungs, through the windpipe and out of the nose.
A
expand
B
contract
C
reflect
D
None of the above
Explanation: 

Detailed explanation-1: -When you breathe out, or exhale, your diaphragm and rib muscles relax, reducing the space in the chest cavity. As the chest cavity gets smaller, your lungs deflate, similar to how air releases from a balloon.

Detailed explanation-2: -When you inhale (breathe in), air enters your lungs, and oxygen from that air moves to your blood. At the same time, carbon dioxide, a waste gas, moves from your blood to the lungs and is exhaled (breathed out). This process, called gas exchange, is essential to life.

Detailed explanation-3: -When you inhale, your diaphragm contracts (tightens) and moves downward. This creates more space in your chest cavity, allowing the lungs to expand. When you exhale, the opposite happens-your diaphragm relaxes and moves upward in the chest cavity.

Detailed explanation-4: -The two main steps involved in breathing are inhalation and exhalation. Inhalation is a process through which air is taken into the lungs. In this process, the ribs move forward while the diaphragm contracts. The volume of the thoracic cavity increases and the pressure inside the lungs is reduced.

There is 1 question to complete.