Research on cock | Medical Research on Penis _Assignment help by careermalls.com

What is cock or penis?

The male genital organ of better vertebrates, sporting the duct for the transferring of sperm in the course of copulation. In humans and maximum other mammals it is composed largely of erectile tissue and is used additionally for urination.

Parts of the Cock:

• Root of the penis (radix): 
  It is the attached element, including the bulb of penis in the middle and the crus of penis, one on both side of the bulb. It lies inside the superficial perineal pouch.
• Body of the penis (corpus):
  It has two surfaces: dorsal (poster superior inside the erect penis), and ventral or urethral (going through downwards and backwards in the flaccid penis). The ventral floor is marked by a groove in a lateral course.
• Epithelium: 
  Epithelium of the penis consists of the shaft skin, the foreskin, and the preputial mucosa at the interior of the foreskin and covering the glans penis. The epithelium isn't connected to the underlying shaft so it's far unfastened to glide from side to side

Anatomy of Cock or Penis:

The penis is the male sexual organ. The shaft is the longest part of it. The pinnacle or glans is at the give up of the shaft. The hole on the tip of the pinnacle, where urine and semen pop out, is called the meatus. Inner, cylinder-fashioned chambers known as the corpora cavernosa run the duration of the penis. They have got a maze of blood vessels, tissue, and open pockets. The urethra, the tube that urine and semen flow through, runs along the underside of them, within the spongy tissue of the corpus spongiosum.

Two foremost arteries (one in every of the corpora cavernosa) and numerous veins pass
blood inside and outside. Nerves relay messages to and from different components of your body.

Physiological Functions of Cock or Penis:

• What is Erection?

An erection starts off evolved in your mind. Something you noticed, felt, smelled, heard, or concept makes your nerves ship chemical messages to the blood vessels to your penis. The arteries relax and open up to let extra blood to drift in; on the same time, the veins close up. As soon as blood is within the penis, strain traps it in the corpora cavernosa. Your penis expands and holds the erection.

When the influx of blood stops and the veins open, your penis turns into soft.

Ø    What is Ejaculation?

When you're aroused, tubes known as the vas deferens squeeze sperm from the testes towards the returned of the urethra. The seminal vesicles additionally release fluid there. The urethra senses the sperm and fluid combination. Then, at the height of sexual pleasure, it sends signals on your spinal cord, which in turn sends signals to the muscle tissues at the base of your penis. Those agreement powerfully and quickly, each 0.8 seconds. This forces the semen out of the penis as you climax.

Urination Phenomena:

In males, the expulsion of urine from the body is performed via the penis. The urethra drains the bladder through the prostate gland wherein its miles joined by means of the ejaculatory duct, after which onward to the penis. At the basis of the penis (the proximal cease of the corpus spongiosum) lies the external sphincter muscle. This is a small sphincter of striated muscles and is in healthy adult males beneath voluntary control. Relaxing the urethra sphincter permits the urine within the higher urethra to go into the penis well and therefore empty the urinary bladder.

Physiologically, urination involves coordination among the vital, autonomic, and somatic worried structures. In toddlers, some aged individuals, and those with neurological injury, urination may additionally arise as an involuntary reflex. Mind centers that modify urination include the Pontine micturition center pontine micturition middle, periaqueductal grey, and the cerebral cortex. for the duration of erection, these facilities block the relaxation of the sphincter muscle mass, in order to act as a physiological separation of the excretory and reproductive function of the penis, and preventing urine from entering the top portion of the urethra for the duration of ejaculation

Structure of Cock or Penis:

The human penis is made up of 3 columns of tissue: two corpora cavernosa lie next to each other on the dorsal facet and one corpus spongiosum lies between them on the ventral aspect.

The enlarged and bulbous-shaped end of the corpus spongiosum bureaucracy the glans penis, which helps the foreskin, or prepuce, an unfastened fold of skin that during adults can retract to expose the glans. The area on the underside of the penis, where the foreskin is connected, is called frenum.The rounded base of the glans is known as the corona. The perineal raphe is the great line along the underside of the penis

The urethra, which is the closing a part of the urinary tract, traverses the corpus spongiosum, and its commencing, called the meatus lies at the tip of the glans penis. Its miles a passage each for urine and for the ejaculation of semen. Sperm are produced within the testes and saved inside the connected epididymis. At some point of ejaculation, sperm are propelled up the vas deferens, ducts that pass over and behind the bladder. Fluids are delivered via the seminal vesicles and the vas deferens will become the ejaculatory ducts, which join the urethra in the prostate gland. The prostate in addition to the bulbourethral glands upload further secretions, and the semen is expelled via the penis.

The raphe is the visible ridge among the lateral halves of the penis, determined at the ventral or underside of the penis, going for walks from the meatus (commencing of the urethra) throughout the scrotum to the perineum (place between scrotum and anus).

The human penis differs from the ones of maximum different mammals, because it has no baculum or erectile bone, and as a substitute is predicated absolutely on engorgement with blood to reach its erect state. It can't be withdrawn into the groin, and it's far larger than average within the animal kingdom in proportion to frame mass.

Penile Growth and Puberty:

On getting into puberty, the penis, scrotum and testicles will make bigger toward maturity. All through the system, pubic hair grows above and across the penis. A huge-scale examine assessing penis size in hundreds of 17- to 19-12 months-old men located no distinction in average penis length among 17-12 months-olds and 19-yr-olds. From this, it can be concluded that penile boom is normally entire not later than age 17, and possibly in advance.