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The septum is incomplete distally, perforated on its dorsal margin by vertically orientated openings in the pectiniform septum that provides communication between the corpora. Along the inner aspect of the tunica Indocin Oral Suspension (Indomethacin Oral Suspension)- Multum, numerous flattened columns or sinusoidal trabeculae composed of fibrous tissue, elastin fibers and smooth muscle surround pros endothelium-lined sinusoids or cavernous Indocin Oral Suspension (Indomethacin Oral Suspension)- Multum. In addition, a row of structural trabeculae arises near the junction of the three corporal bodies and inserts in the wall of the corpora about the midplane of the circumference.

The tunical albuginea provides a tough uniform backing for the engorged sinusoidal spaces. The tunical albuginea of the corpus spongiosum is thinner and contains smooth muscles that aid ejaculation. The glans is devoid of tunica albuginea. The corpus spongiosum Indocin Oral Suspension (Indomethacin Oral Suspension)- Multum bulbous where it is covered by the bulbospongiosus to form the urethral bulb.

The ischiocavernosus is a paired muscle that arises from the inner surface of the inschial tuberosity and inserts into the medial and inferior surface of the corpora. These muscles increase penile turgor during erection beyond aciphex attainable by arterial pressure alone. They are supplied by the perineal branch of the perineal nerve (S3-4). The bulbospongiosus muscle invests the bulb of the urethra and distal corpus spongiosum.

It arises from the central tendon of the perineum. The fibres run obliquely upwards and laterally on each side of the bulb and insert in the midline dorsally. The muscle is supplied by a deep branch of the perineal nerve and helps Activase (Alteplase)- FDA empty the last few drops of urine and to ejaculate semen.

The arterial supply to the erectile apparatus originates from superficial and deep arterial systems. The superficial arterial system arises as two symmetrically arranged vessels arising from the inferior external pudendal artery (a branch of the femoral artery). Each of these vessels divides inito a dorsolateral and ventrolateral branch, which supply the skin o fhte shaft and prepuce. At the coronal Indocin Oral Suspension (Indomethacin Oral Suspension)- Multum there is a communication with the deep arterial system.

The deep arterial system arises from the internal pudendal artery, which is the final branch of the anterior trunk of Indocin Oral Suspension (Indomethacin Oral Suspension)- Multum internal iliac artery. As it emerges, it divides into the perineal and penile arteries, running deep to the superficial transverse perineal muscle and pubic symphysis. The bulbo-urethral artery supplies the bulb of the urethra, the corpus spongiosum and the glans penis.

It may arise from the cavernous, dorsal or acessory pudendal arteries. The urethral artery commonly arises Indocin Oral Suspension (Indomethacin Oral Suspension)- Multum a separate branch form the penile artery, but Paremyd (Hydroxyamphetamine Hydrobromide, Tropicamide)- FDA arise from the artery to the bulb, the cavernous or the dorsal artery.

It runs on the ventral surface of the corpus spongiosum beneath the tunica albuginea. The cavernous artery (deep artery fo Indocin Oral Suspension (Indomethacin Oral Suspension)- Multum penis) usually arises form the penile artery, but may originate from Indocin Oral Suspension (Indomethacin Oral Suspension)- Multum accessory pudendal.

This artery has tortuous configuration to accommodate for elongation during erection. It may arise from the accessory internal pudendal artery within the pelvis, and thus may be at risk during radical pelvic surgery. On its way to the glans, it gives off circumflex arteries to supply the corpus spongiosum.

Vk old, the dorsal artery runs in a ventrolateral position near the sulcus prior to entering the glans. The frenular branch of the dorsal artery curves around each side of the distal shaft to enter the frenulum and glans ventrally.

Arterial blood is conveyed to the erectile tissues in the deep arterial system by means of dorsal, cavernous and bulbo-urethral arteries. The cavernous artery (deep artery of the penis) gives off multiple helicine arteries among the cavernous spaces within the center of the erectile tissue. Most of these open directly into the sinusoids bounded by trabecular, but a few helicine arteries terminate in capillaries Indocin Oral Suspension (Indomethacin Oral Suspension)- Multum supply the trabeculae.

The petiniform septum distally provides communication between the two corpora. The emissory veins at the periphery collect the blood from the sinusoids through the subalbugineal venous plexuses and empty it into the circumflex veins jpras open drain into the deep autonomic nervous system the autonomic nervous system vein.

With erection, the arteriolar and sinusoidal walls relax secondary to neurotransmitters and the cavernous spaces dilate, enlarging the corporal bodies and stretching the tunica albuginea. The venous tributaries between the sinusoids and the subabugineal venous plexus are compressed by the dilating sinusoids and the stretched tunica albuginea.

The venous drainage system consists of three distinct groups of veins-superficial, intermediate and deep. The intermediate system consists of the deep dorsal vein and circumflex veins that drain the glans, corpus spongiosum and distal two-thirds of the corpora cavernosa. The veins leave the glans via a retrocoronal plexus to join the deep dorsal vein that runs in the groove between the corpora.

The latter passes through a psace in the suspensory igament and between the puboprostatic ligament and drains into the internal iliac veins. The deep drainage system consists of the cavernous vein, bulbar vein and crural veins. Blood from the sinusoids from the proximal third of the penis, carried by emissary veins, drains directly into the cavernous veins at the periphery of the corpora cavernosa.

The two cavernous veins join to form the main cavernous vein that lies under the cavernous artery and nerves. The crural veins arise from the dorsolateral surface of each crus and unite to drain into the internal pudendal vein.

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