Which structure in the figure is the zona pellucida? 
Definitions:
Disinfecting Solution
A chemical liquid used to eliminate or reduce harmful pathogens on surfaces or instruments to prevent infection.
Suction Machine
A device used to remove fluids from the body by vacuum, commonly used in medical settings.
Myocardial Infarction
A medical condition also known as a heart attack, which occurs when blood flow to the heart is blocked.
Illness Behavior
The way individuals respond to symptoms of illness, including how they monitor their body, define and interpret their symptoms, and seek treatment.
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