why is it that people sometimes don t get enough air ? is because i am doing a children s book that we have to explain about respiratory system but with a story i am doing this so far: One day while Samantha was playing @ the park, she was getting really tired because she was playing tag with her friend. she had run 5 minutes straight without stopping. She felt like she couldn t get any air. She went inside and sat down to get some rest while she told her mom what had happened. Then on that same night, she felt very weak. And she wasn t getting enough air. Next morning, she felt the same as last night. Her mom planned on taking her into the doctor so they could check her. When Samantha and her mom went inside, the doctor asked what had happened. So they both told the doctor about the situation. and idk what else to say... we have to explain the respiratory system but in a child level So please please please, answer ASAP because is due tomorrow, April 15, 2014 @10:00 A.M. ! thank you very very very much!