Which erectile tissue is ventral and unpaired?

Which erectile tissue is ventral and unpaired?

• A. Corpus cavernosum
• B. Corpus spongiosum
• C. Buck's fascia
• D. Tunica albuginea

Answer: (B)

In the penis, erectile tissue comes in two dorsal, paired cylinders and one midline, ventral cylinder. The midline structure that runs along the ventral surface and surrounds the urethra is the corpus spongiosum. This arrangement makes it ventral and unpaired, while the two dorsal corpora cavernosa are the paired components. The corpus spongiosum stays relatively less rigid during erection to keep the urethral lumen patent, aiding penile function. The other tissues you’ve heard of—tunica albuginea—are fibrous coverings around each erectile body, and Buck’s fascia is the deep fascia that encloses all three erectile tissues. So the ventral, unpaired erectile tissue is the corpus spongiosum.

In the penis, erectile tissue comes in two dorsal, paired cylinders and one midline, ventral cylinder. The midline structure that runs along the ventral surface and surrounds the urethra is the corpus spongiosum. This arrangement makes it ventral and unpaired, while the two dorsal corpora cavernosa are the paired components. The corpus spongiosum stays relatively less rigid during erection to keep the urethral lumen patent, aiding penile function. The other tissues you’ve heard of—tunica albuginea—are fibrous coverings around each erectile body, and Buck’s fascia is the deep fascia that encloses all three erectile tissues. So the ventral, unpaired erectile tissue is the corpus spongiosum.