Dr Ahmed Fathalla Ibrahim VAS DEFERENS VAS DEFERENS

Dr. Ahmed Fathalla Ibrahim

VAS DEFERENS

VAS DEFERENS q. STRUCTURE: a thick-walled tube q. LENGTH: about 18 inches (45 cm) q. FUNCTION: transports sperm from epididymis to ejaculatory duct q. BEGINNING: continuation of tail of epididymis

VAS DEFERENS q COURSE & RELATIONS: 1) Ascends along spermatic cord & emerges from deep inguinal ring 2) Hooks around inferior epigastric artery & passes downward & backward on lateral wall of pelvis 3) Crosses the ureter anteriorly (opposite ischial spine) & runs on posterior surface of bladder 4) Its terminal part is dilated (ampulla) q TERMINATION: joins the duct of seminal vesicle to form the ejaculatory duct

SEMINAL VESICLES q STRUCTURE: a coiled tube q LENGTH: about 2 inches (5 cm) q FUNCTION: produces secretion essential for nourishment of sperms q RELATIONS: v Anterior: posterior surface of bladder v Posterior: rectum v Medial: ampulla of vas deferens q DUCT OF SEMINAL VESICLE: joins vas deferens to form ejaculatory duct

EJACULATORY DUCT q. LENGTH: less than 1 inch (2 cm) q. FORMATION: by union of vas deferens & duct of seminal vesicle (behind neck of bladder) q. COURSE: pierces posterior surface of prostate gland & opens into prostatic urethra (on each side of prostatic utricle) q. FUNCTION: drains seminal fluid to prostatic urethra

PROSTATE GLAND

MALE PELVIC VISCERA

PROSTATE GLAND

PROSTATE GLAND q. STRUCTURE: a fibro-muscular gland q. LENGTH: about 3 cm q. FUNCTION: produces a milky fluid (containing citric acid & acid phosphatase) that help neutralize acidity of vagina q. LOCATION: around prostatic urethra q. EXTENT: from neck of bladder to urogenital diaphragm

PROSTATE GLAND q SHAPE: conical in shape, with a base directed upward & an apex directed downward q LOBES: incompletely divided into 5 lobes 1) Anterior lobe: anterior to urethra, no glandular tissue 2) Median lobe: between urethra & ejaculatory ducts 3) Posterior lobe: posterior to urethra 4) Right & left lateral lobes: on either side of urethra

PROSTATE GLAND q RELATIONS: v Superior: base is related to neck of bladder v Inferior: apex is related to urogenital diaphragm separating from perinuem v Anterior: related to symphysis pubis: 1) Separated from it by retropubic fat 2) Connected to it by puboprostatic ligaments v Posterior: rectum separated from it by fascia of Denonvillier v Lateral: levator ani

PROSTATE GLAND q. Benign enlargement of prostate: 1)Common in old men (>50 years) 2)Caused by hormonal imbalance leading to enlargement of median lobe 3)Effect: pressure effect on urethra causing difficulty in micturation q. Cancer prostate: may send metastases to vertebral column because prostatic venous plexus & vertebral veins are interconnected

MALE URETHRA

PROSTATIC URETHRA

PROSTATIC URETHRA q. LENGTH: about 3 cm q. BEGINNING: continuation of neck of bladder q COURSE: passes through base of prostate then leaves it through its anterior surface (just above apex) q. TERMINATION: continues as membranous urethra q. CHARACTERISTICS: widest & most dilatable part of urethra

PROSTATIC URETHRA q. POSTERIOR WALL: 1)Urethral crest: a longitudinal ridge that contains a depression (utricle); ejaculatory ducts open in urethral crest, on each side of utricle 2)Prostatic sinus: lies on each side of urethral crest, receives openings of prostatic ducts