joy8913
1. The respiratory system is always running and it brings oxygen into your body. The oxygen is then carried throughout the body in your blood by circulatory system.
2. Cardiovascular and respiratory systems.
2 votes Thanks 1
justinegulpo361
thx di ko paren nasaaagutan ngaun Yan nilaktawan ko lang thx sa ans
Answers & Comments
2. Cardiovascular and respiratory systems.