Answer:
-Facial grimacing or a frown.
-Writhing or constant shifting in bed.
-Moaning, groaning, or whimpering.
-Restlessness and agitation.
-Appearing uneasy and tense, perhaps drawing their legs up or kicking.
Explanation:
You may be talking about the nephron or glomerulus.
In the lungs, oxygen is put into the blood and carbon dioxide is taken out of the blood during the process of breathing. After the blood gets oxygen in the lungs, it is called oxygen-rich blood.
