According to national surveys in the Philippines, 10% to 13% of adolescents (13 to 19 years) are wasted (low weight-for-height), 33% to 37% are stunted (low height-for-age), and 17% are underweight (low body mass index [BMI]-for-age); iodine deficiency and anemia are present in 12% and 14% of Filipino adoles- cents, .
The respiratory system's main job is to move fresh air into your body while removing waste gases. Once in the lungs, oxygen is moved into the bloodstream and carried through your body. At each cell in your body, oxygen is exchanged for a waste gas called carbon dioxide.