Assertion: penis's structure | /r/CapableOf | call the corpora cavernosa
Facets:
Source sentences:
text: An erection occurs when two tubular structures, called the corpora cavernosa, that run the length of the penis, become engorged with venous blood.
text: An erection occurs when two tubular structures, called the corpora cavernosa, that run the length of the penis, become engorged with venous blood.