Oxygen is taken into the lungs.
Blood enters the heart through two large veins, the inferior and superior vena cava, emptying oxygen-poor blood from the body into the right atrium of the heart. As the atrium contracts, blood flows from your right atrium into your right ventricle through the open tricuspid valve.
Answer:
A Graphic Element shows relationships, hierarchy, and emphasis visually.
Explanation:
Answer:wash your hands off
Explanation:even though you wipe it with a paper towel the germs still not gone
