Examine the numerous long structures extending from the surface of some of the cells in the following figure.Cells with these long structures could be found lining ________. 
Definitions:
Vas Deferens
A long, muscular tube that transports mature sperm from the testes to the urethra in preparation for ejaculation.
Bulbourethral Gland
A gland in males that secretes a fluid into the urethra to lubricate and neutralize acidity before ejaculation.
Reverse Transcriptase
An enzyme used by some viruses to synthesize DNA from RNA, playing a key role in the replication cycle of retroviruses.
Viral RNA
The genetic material of certain viruses, composed of ribonucleic acid (RNA), which enables them to replicate and infect host cells.
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