The structure which is highlighted and indicated by the leader line is: urethra.
What is an excretory system?
An excretory system can be defined as a living system that is saddled with the responsibility of expelling or removing waste products from the body of a living organism, in order to prevent damage to the body and help maintain homeostasis.
The expulsion of waste in organisms.
Generally, waste products are removed from the body of a living organism by the following excretory organs and structures:
In this scenario, urethra is the structure which is highlighted and indicated by the leader line.
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