Which 2 gasses are involved with both the respiratory and the circulatory system? 1. Nitrogen and oxygen

2.oxygen and carbon dioxide
3. Oxygen ad urea

4.carbon dioxide and helium

Breast-feeding you recover from childbirth and appears to improve your long-term health. true or false?

The best way to get vitamins and minerals is to  a.  eat more fruits than vegetables.    b.  drink as much fruit juice as possible.    c.  take vitamin supplements.    d.  eat a balanced diet.

Minor illnesses: a.) decrease the risk of sids b.) increase the risk of sids c.) increase the risk of hospitalization d.) decrease the risk of allergies e.) increase the risk of allergies