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==Introduction==

==Introduction==

The penis is the male copulatory organ. It is formed from three parts; two Corpora cavernosa, comprising of cavernous tissue and a connective tissue sheath the tunica albuginea, and the single Corpus Spongiosum which contains the urethra encased in a vascular tissue sleeve. There are two types of penis: the musculovascular and fibroelastic penis.

The penis is the male copulatory organ. It is formed from three parts; two Corpora cavernosa, comprising of cavernous tissue and a connective tissue sheath the tunica albuginea, and the single Corpus Spongiosum which contains the urethra encased in a vascular tissue sleeve. There are two types of penis: the musculovascular and fibroelastic penis.

The corpus cavernosum is made up from the paired columns of cavernous tissue surrounded by connective tissue known as the crura of the penis or corpora cavernosa.  

The corpus cavernosum is made up from the paired columns of cavernous tissue surrounded by connective tissue known as the crura of the penis or corpora cavernosa.  

*In the dog the distal corpus cavernosum is transformed into bone to form the [[Reproductive_Behaviour_-_Copulatory_Behaviour_Dog_- Anatomy & Physiology|Os penis]] which plays an important part in the dog achieving intromission with the bitch during copulation.

*In the dog the distal corpus cavernosum is transformed into bone to form the [[Dog Copulatory_Behaviour - Anatomy & Physiology|Os penis]] which plays an important part in the dog achieving intromission with the bitch during copulation.

'''Corpus spongiosum'''

'''Corpus spongiosum'''

Lymph from the penis and prepuce drains into the superficial inguinal lymph nodes.

Lymph from the penis and prepuce drains into the superficial inguinal lymph nodes.

[[Category:Male Reproduction]]

[[Category:Male Reproduction]]