Mammal, pig penis (LM, Low)

Structure List Corpus cavernosum Corpus spongiosum Urethra Transitional epithelium Low Magnification View

PENIS OF THE PIG. The penis of mammals is well vascularized. In the pig and most mammals, there is muscular tissue as well as large blood sinuses surrounding the central duct, or urethra. At low magnification on this slide, start by identifying the urethra which is in the space lined by transitional epithelium in the center of the specimen. Around it are two sets of sinuses surrounded by connective tissue and muscle. The smaller one next to the urethra is the corpus spongiosum. The larger one, which is separated from the spongiosum by connective tissue and muscle, is the corpus cavernosum. Identify both of these structures. Note that, unlike carnivores, most mammals do not have bone in the penis.