MORPHOLOGY AND ANATOMY

• Two ducts are present on each side in male scrotum, each of which is thick a cord with small lumen.
• From inside it is lined by Stereocilia. (Stereocilia are apical modification of cells that form small out projections that help movement of sperms towards ejaculatory duct) .
•  It is a direct continuation of Duct of Epididymis.
•  Vas Deferens lies superficial to testis in scrotum. It runs posterior to it and enters the anterior abdominal wall via inguinal canal. It then runs laterally in pelvis after crossing external iliac vessels. It ends by joining Seminal duct and forming ejaculatory duct.

BLOOD SUPPLY

• Arterial supply is provided by Artery to Ductus Deferens which arises from Superior Vesical artery.
• Venous drainage for most part is by Testicular Vein. Terminal part drains into Vesicular Venous Plexus.

NERVE SUPPLY

 Vas Deferens is supplied by Inferior Hypogastric Plexus. Its nerve supply is autonomic in nature.

LYMPHATIC DRAINAGE

 Lymph from Ductus Deferens drains into External Iliac lymph nodes. While some of it drains into nodes along aorta and inferior vena cava.

FUNCTION IN EJACULATION

It stores sperms for ejaculation and helps them move towards ejaculatory duct. As Ejaculation occurs it contracts and sends sperms towards ejaculatory duct in form of rhythmic contractions away from testis (peristalsis).

CLINICAL SIGNIFICANCE

 1.  It is easily palpable because of its thick cord like structure and easy access via scrotum.

2.  As it is superficial to testis and easily approachable. It is often cut in a surgical procedure (Vasectomy) to induce male contraception. It is mostly reversible as cut ends can be joined together.