Answer:
There is a higher oxygen content in the air of the lungs than that of oxygen-depleted blood and a lower carbon dioxide concentration. This gradient of concentration causes gas exchange during respiration.
Explanation:
la verdad no se la repuesta si me la hubiera sabido si te la hubiera dicho
ions are electrically charged particles formed when atoms lose or gain electrons
Answer:
Matter is conserved because atoms are conserved in physical and chemical processes. As complex as the water cycle is, water molecules are conserved and endlessly recycled in nature. Conservation of mass is a physical law that s never broken.This cycle continues with no loss of water.
