Which of the following is not true of the corpora cavernosa?
A. They have the ability to cause an erection, by engorging with blood and trapping the blood temporarily.
B. They are cylinders of erectile tissue.
C. They completely surround the urethra in the penis.
D. They are surrounded by the tunica albuginea.
E. All of these are true of the corpora cavernosa.
Answer: C
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