What Is a Micropenis?

A cylindrical body with a sponge-like structure at the penis is called a penile cavernous body. There are 2 sponge bodies in the penis, which are located on the dorsal side of the penis and are pointed cones. The two pieces are next to each other closely. The front end meets the urethral cavernous enlargement, and the rear end branches into the penile cavernous horn, which ends at each side of the pubic arch. Due to the internal structure of this cavernous body, the penis can erect, swell when it is congested, and can usually shrink. The corpora cavernosa develops on both sides, and the penis can bend to the dysplastic side after erection; it is easy to repair the connection after injury.

A cylindrical body with a sponge-like structure at the penis is called a penile cavernous body. There are 2 sponge bodies in the penis, which are located on the dorsal side of the penis and are pointed cones. The two pieces are next to each other closely. The front end meets the urethral cavernous enlargement, and the rear end branches into the penile cavernous horn, which ends at each side of the pubic arch. Due to the internal structure of this cavernous body, the penis can erect, swell when it is congested, and can usually shrink. The corpora cavernosa develops on both sides, and the penis can bend to the dysplastic side after erection; it is easy to repair the connection after injury.

Chinese name

Corpus cavernosum

Foreign name

Corpus cavernosum

Nature

Three parallel sponges

Attributes

Sharp cone

Cavernous body of penis

(I) Composition:

1. Arterial branches:

The dorsal arteries of each penis emit 1-2 arterioles, which enter the ipsilateral penile cavernous body at the junction (or distal end) of the penis cavernosal foot. This arteriole runs longitudinally in the penile cavernous body and emits small branches. Some of the branches (300-400 m in diameter) penetrate the ventral side of the penile cavernous body and enter the urethral cavernous body. The other branches emit numerous tree branches in the cavernous body of the penis, and these small branches are further branched in the following two different forms: arteries divided into capillaries, branching multiple times next to the arteries, and finally forming capillaries. The capillaries are scattered in the sponge tissue, but they are especially dense around the small blood vessels. After they are collected, the sponge tissue is injected into the subleukin venous plexus; It is divided into spiral arteries, the stroke is curved and tapered, and it is emitted with the sponge. Sinus anastomosis of the traffic branch (approximately 10 m in diameter).

2. Arterial branch:

On the surface of the penile cavernous body, the ring arteries divided by the dorsal penile artery also issue many branches to supply the penile cavernous body. These branches, like the small arteries in the penile cavernous body, are partially connected to the cavernous sinus, and the rest are divided into capillaries.

3. Penile cavernosal venous return:

The small veins that drain the cavernous sinus come from various parts of the surface of the cavernous body of the penis. The posterior sinus veins (about 30 m in diameter) anastomosis with each other to form a subleukin venous plexus (about 50 m in diameter) and merge with each other to form a guide vein (about 150 m).

There are two blood supply systems in the penile cavernous body: the nutrition system is the capillary system, which is the nutritional blood vessels of the penile cavernous body; the functional system is the spiral artery and its branch that communicates with the cavernous sinus. There is a submucosal venous plexus on the surface of the cavernous body of the penis. The researchers emphasized that the posterior capillaries anastomosis with each other to form a submucosal venous plexus. After confluence, it is injected into the posterior sinus vein that drains the cavernous sinus. Leading veins are formed after the convergence of the posterior sinus veins.

(Two) physiological functions:

The two blood supply systems in the penile sponge have their own physiological functions. When the penis is weak, blood mainly flows through the capillary system to play a nutritional role. The spiral arteries have the function of regulating blood flow. Under the intima, there is an intimal pad composed of smooth muscles. When this pad relaxes, the spiral arteries open and expand, and blood is injected into the cavernous sinus to erect the penis. The subleukin plexus is squeezed between the leukomembrane and cavernous sinus during penile erection, which plays an important role in the venous occlusion mechanism.

Cavernous body of penis

1. The corpus cavernosum is erect, full, full, uniform in thickness, without abnormality in form, and the contrast agent is distributed uniformly and uniformly. Orthophotos showed that the sides of the cavernous bodies on both sides were separated from left to right and attached to the lower limbs of the pubic bone and the sciatic branch. The side view film can present a normal erection angle.

2. The feet of the sponge body are full, without obvious distortion, and the edges are clear.

3. The deep dorsal vein, glans, and urethral cavernous body were not visualized; the superficial penile vein and external iliac vein were not visualized.

4. Proximal dorsal deep veins, around the cavernous feet on both sides, and the prostate venous plexus are clean and clear. No abnormal high-density and vascular shadows are seen.

5. The internal genital veins, venous plexus around the bladder, internal and external iliac veins, common iliac veins and other pelvic veins are not visualized.