Male Pelvis Flashcards
When do the testes usually descend during development?
During the third trimester
Spermatic cord contains…
Vas deferens Testicular artery Testicular veins Genital branch of genitofemoral nerve Cremaster muscle Layers of fascia Sympathetic fibers
Genitofemoral nerve
Lies on top of the psoas muscle
Comes from L1 and L2
Genital branch exits through the inguinal canal, sends motor fibers to cremaster muscle
Femoral branches enters over the inguinal ligament, and is responsible for cutaneous innervation of the anterior thigh
Prostate gland
Secretes a white, milky alkaline fluid that makes 30% of the volume of the semen
Urethra passes through the middle
Inferior to the bladder
Seminal gland
Also called seminal vesicle
Secretes 70% of fluid into semen
Ejaculatory duct
Formed by the meeting of vas deferens and seminal gland within the prostate
Blood supply of the male pelvis
Branches of the internal illiac artery
Does the ureter go above or below the vas deferens?
Below
Branches of the internal iliac artery
Obturator artery Superior and inferior gluteal arteries Internal pudendal artery Obliterated umbilical artery Vesical arteries
Where does the testicular artery branch from?
The abdominal aorta
Between the superior and inferior mesenteric arteries
Like ovarian arteries
Joins the ductus deferens in the spermatic cord
Does the obliterated artery carry oxygenated or deoxygenated blood?
Deoxygenated
From the fetus to the mothers placenta
Where do the left and right gonadal veins drain to?
Left: drain into the left renal vein, and then into the inferior vena cava
Right: drain directly into the inferior vena cava
Somatic innervation of the male pelvis
Lumbosacral plexus (pudendal nerve)
S2, S3, S4
Motor branches of the pudendal nerve supply levator ani muscle and sphincter muscles
Sensory branches supply the skin of the perineum and the external genitalia
Sympathetic and Parasympathetic innervation of the pelvic viscera
Symp: sympathetic chain
Parasymp: pelvic splanchnic nerves from S2, S3, S4
Pelvic floor muscles
Levator ani (pubococcygeus and iliococcygeus) Coccygeus (ischiococcygeus)
