1) respiratory system is made of the windpipe lungs diaphragm alveoli takes in oxygen and waste
2) breathing allows you to take in the oxygen your cells need and expel carbon but when you breathe you loose water.
3) the lungs are the only organs that can float on water bc it is holding 300 million ballon like structure called the alveoli
Answer:
keep straight legs is not normal but having arms out I think is also wrong, so now I'm confused too
Explanation:
Yes that's our special power of stop bleeding when injured.
C. 2-4 days a week is recommended
Answer:
it is the average period of time a person can expect to live.
Explanation: