What does the process of urination require?
aerobic capacity relaxation of muscles the looseness of soil sunlight air metabolic reaction blood Converting waste.
A B C D E F G H
Urination requires relaxation of the sphincter muscle.
 the process of urination requires relaxation of muscles 
What does the process of urination require? (A) aerobic capacity (B) relaxation of muscles (C) the looseness of soil (D) sunlight (E) air (F) metabolic reaction (G) blood (H) Converting waste.