<span>The answer to this question would be: tissues; decrease
Oxygen is delivered to the tissue by the heart. It will be unloaded in the tissue, causing the oxygen level in the blood to be decreased. After that, the blood also picks up the carbon dioxide so its level will be increased.
In lungs, the carbon dioxide will be unloaded and oxygen will be loaded back into the blood.</span>
You must've forgotten to put in the options for us to select from
Cuticle coating on leaves, and thick epidermal call walls.
1) breathing
2) emotional stress
3) physical stress
4) vagal stimulation
5) medications
6) illness
7) diseased heart
