Refer to the figure showing an arthropod exoskeleton. 
Which structure is/are common to arthropods and annelids?
Definitions:
Liver Damage
Harm to the liver, often resulting from conditions like hepatitis, alcohol misuse, or drug toxicity, impacting its ability to function properly.
Prenatal Development
Refers to the process of growth and development within the womb from conception to birth.
Psychoactive Drugs
Substances that affect the mind, mood, or other mental processes, often altering consciousness or perceptions.
Nervous System
The network of nerve cells and fibers that transmits nerve impulses between parts of the body, coordinating its actions and sensory information.
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