Steel has a memory when it is placed under stress and returns to its original shape when the stress has been removed; this is called __________

A crack or tear in the lining of the anus is called a(n):

A) sentinel pile B) rectal excision C) anal fissure D) digital dilation

The exchange of gases between the blood and body cells is called?

A) ?inhalation. B) ?inspiration. C) ?exhalation. D) ?internal respiration.