30 points and please help What are the three major parts of the respiratory system?
Group of answer choices
The muscles of respiration
The lungs
The brain
The muscles of exercising
The veins
The heart
The airway

Lungs

Airway

muscles of respiration

or The muscles of exercising

the group of respiration

the lungs

the airway

when in a crucial situation, after calling 911, the correct posture for delivering effective compression is the proper hand placement.

first, place two fingers at the sternum, then put the heel of your other hand next to the fingers and place hand on top of the other. lock your elbows by using your body’s weight and compress the victim’s chest with a depth of 2 inches.

moreover, do 15 compression and 2 breaths, this process must be done four times until there is a pulse or a arrive.