Airplanes became involved in active battle
The correct option is B
exocrine glands, they are not found in the endocrine system as those are called endocrine glands.
<span>The secretions of exocrine glands reach their target by traveling through a duct (tube). Exocrine glands are not part of the endocrine system.</span>
Answer:
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The fundamental plan of operation for a government.
The division of powers among the three branches (legislative, executive, judicial) of government.
The system that gives each branch of government some ways to keep the other two branches from becoming too powerful.