Vas Deferens

Question 1

Definition

Answer 1

Long duct with very thick muscular wall so that it can carry sperms from lower level in scrotum to higher level

Question 2

Size

Answer 2

45 cm long

Question 3

Beginning

Answer 3

As continuation of epididymis tail in scrotum

Question 4

Ends

Answer 4

In a dilatation (vas ampulla) medial to seminal vesicle on urinary bladder posterior surface, where it joins seminal vesicle duct forming ejaculatory duct which opens in prostatic urethra

Question 5

Relations: in spermatic cord

Answer 5

1. Lies in spermatic cord posterior part
2. Easily felt among cord constituents because of its thick muscular wall

Question 6

Relations: in inguinal canal

Answer 6

1. Enters canal through superficial inguinal ring and leaves it at deep inguinal ring
2. It passes lateral to inferior epigastric vessels, then bends medial behind it

Question 7

Relations: in pelvis wall

Answer 7

1. It passes downwards and backwards
2. Crosses:
   - External iliac vessels
   - Obliterated umbilical artery
   - Obturator nerve and vessels
   then it crosses ureter medial at ischial spine

Question 8

Relations: on bladder base

Answer 8

1. Runs medial and downwards
2. Terminal part is dilated forming vas ampulla which is related to:
   - Lateral: Seminal vesicle
   - Anterior: Bladder base
   - Posterior: Rectum

Question 9

Arterial supply

Answer 9

Artery of vas from inferior vesical artery or superior vesical artery