g14: male reproductive system - anatomy resources...g14: male reproductive system anat 6010- medical...
TRANSCRIPT
4. Spermatic
Cord
Contents
I. Ductus def
II. Testic a. and v.
III. Cremaster m.
IV. Gen. br. (L1-L2)
V. Autonomics
VI. Lymphatics
Pg. 49
7) Prostate
Pg. 50
a) Ejaculatory duct
b) Prostate lobes
c) Prostate function
d) Vascular supply
e) Autonomic innervation
f) Digital rectal exam
g) Prostatectomy/Impotence
7) Prostate
Pg. 50
a) Ejaculatory duct
b) Prostate lobes
c) Prostate function
d) Vascular supply
e) Autonomic
f) Digital rectal exam
g) ProstatectomyInferior vesical artery
7) Prostate
Pg. 50
a) Ejaculatory duct
b) Prostate lobes
c) Prostate function
d) Vascular supply
e) Autonomic innervation
f) Digital rectal exam
g) Prostatectomy/Impotence
7) Prostate
Pg. 50
a) Ejaculatory duct
b) Prostate lobes
c) Prostate function
d) Vascular supply
e) Autonomic innervation
f) Digital rectal exam
g) Prostatectomy/Impotence
Pg. 509) Penis - e) Innervation
e) Sympathetics of the penis originate from T10-L2spinal cord levels and enter the inferior hypogastricplexus from:
- Hypogastric nerves
- Sacral splanchnic nerves
Pg. 509) Penis - e) Innervation
f) Parasympathetics of the penis originate from S2-S4spinal cord levels and enter the inferior hypogastricplexus from:
- Pelvic splanchnic nerves
Semen, Erection and Ejaculation
• Semen
• Sperm, seminal vesical, prostate, bulbourethral
gland
• Erection
• Parasympathetic control
• Ejaculation
• Sympathetic control
• Emission and Ejaculation
Pg. 52
Semen on glass
Erection - Parasympathetic
• Parasympathetic control (S2-S4)
• Dilatation of the deep arteries increases blood flow
into the cavernous spaces of the erectile tissue
Pg. 52
Erection - Parasympathetic
• Parasympathetic control (S2-S4)
• Dilatation of the deep arteries increases blood flow
into the cavernous spaces of the erectile tissue
Pg. 52
Emission - Sympathetic (L1-L2)
• Contraction of smooth muscle within ductus deferens
and seminal vesicles and prostate
• Contraction of internal urethral sphincter
• Emission - Release of sperm and gland secretions into
the urethra
Pg. 52
Ejaculation - Sympathetic (L1-L2• Sympathetic control (L1-L2)
• Closure of the urethral sphincter
• Contraction of smooth muscle in ductus deferens
• Somatic (pudendal) control (S2-S4)
• Contraction of the ischiocavernosus and bulbospongiosus muscles
Pg. 52
Detumescence
• Sympathetic control (L1-L2)
• Constriction of the smooth muscle of the
helicine arteries, arresting arterial blood flow to
the erectile tissue
• Venous blood leaves the erectile tissue via the
dorsal deep veins, which drain into the prostatic
venous plexus
Pg. 52