penis

Examples of penis in the following topics:

• Penis

  • In human males, the penis serves as both a reproductive organ and as a urinal duct.
  • The glans penis is the bulbous end of the penis formed by the corpus spongiosum.
  • The raphe is the noticeable ridge between the halves of the penis.
  • This diagram compares the structure of the penis to the clitoris.
  • This is a diagram of a human penis with its parts labeled.

• Erectile Dysfunction and the Blue Pill

  • A penile erection is the hydraulic effect of blood entering and being retained in sponge-like bodies within the penis.
  • The process is often initiated as a result of sexual arousal, when signals are transmitted from the brain to nerves in the penis.
  • In some cases, treatment can involve prostaglandin tablets in the urethra, injections into the penis, a penile prosthesis, a penis pump, or vascular reconstructive surgery.
  • These pumps should be distinguished from other penis pumps (supplied without compression rings) which, rather than being used for temporary treatment of impotence, are claimed to increase penis length if used frequently, or vibrate as an aid to masturbation.
  • The corpus cavernosum penis is one of a pair of sponge-like regions of erectile tissue which contain most of the blood in the penis during penile erection.

• Male Sexual Response

  • Physical and/or psychological stimulation leads to vasodilation and subsequent increased blood flow into the three spongy areas that run along the length of the penis (the two corpora cavernosa and the corpus spongiosum).
  • The penis grows enlarged and firm, the skin of the scrotum is pulled tighter, and the testes are pulled up against the body.
  • As sexual arousal and stimulation continues, the glans of the erect penis will swell wider.
  • The muscles of the pelvic floor, the ductus deferens (between the testes and the prostate), the seminal vesicles, and the prostate gland may begin to contract in a way that forces sperm and semen into the urethra inside the penis.
  • Once erect, his penis may gain enough stimulation from contact with the inside of his clothing to maintain the erection for more time.

• Anatomy of the Male Reproductive System

  • The male reproductive system includes external (penis, scrotum, epididymus, and testes) and internal (accessory) organs.
  • These external structures are the penis, scrotum, epididymis, and testes.
  • The penis is the male organ for sexual intercourse and urination.
  • Semen and urine leave the penis through the urethra.
  • The scrotum is a loose, pouch-like sack of skin that hangs behind the penis, containing the testes.

• Male Reproductive Anatomy

  • Primitive gonads become testes; other tissues produce a penis and scrotum in males.
  • Sperm are immobile at body temperature; therefore, the scrotum and penis are external to the body so that a proper temperature is maintained for motility.
  • The penis is an organ that drains urine from the renal bladder and functions as a copulatory organ during intercourse.
  • The penis contains three tubes of erectile tissue running through the length of the organ.
  • After intercourse, the blood drains from the erectile tissue and the penis becomes flaccid.

• Overview of the Male and Female Reproductive Systems

  • During this process, the erect penis of the male is inserted into the female's vagina until the male ejaculates semen, which contains sperm, into the vagina.
  • The final category, used for copulation and deposition of the spermatozoa (sperm) within the female, includes the penis, urethra, vas deferens, and Cowper's gland.
  • Only our species has a distinctive mushroom-capped glans, which is connected to the shaft of the penis by a thin tissue of frenulum (the delicate tab of skin just beneath the urethra).
  • One of the most significant features of the human penis is the coronal ridge underneath the gland around the circumference of the shaft.
  • Magnetic imaging studies of heterosexual couples having sex reveal that during coitus, the typical penis expands to fill the vaginal tract, and with full penetration can even reach the woman's cervix and lift her uterus.

• Vagina

  • During arousal, the vagina gets moist to facilitate the entrance of the penis.
  • The inner texture of the vagina creates friction for the penis during intercourse.
  • The walls of the vagina are composed of soft elastic folds of mucous membrane which stretch or contract (with support from pelvic muscles) to the size of the inserted penis or other object, stimulating the penis and helping the male to experience orgasm and ejaculation, thus enabling fertilization.

• Genital Herpes

  • In males, the lesions occur on the glans penis, shaft of the penis or other parts of the genital region, on the inner thigh, buttocks, or anus.
  • Less frequent, yet still common, symptoms include discharge from the penis or vagina, fever, headache, muscle pain (myalgia), swollen and enlarged lymph nodes and malaise.

• Contraception and Birth Control

  • Natural methods include avoiding intercourse when ovulation is occurring ("natural family planning) or withdrawing the penis from the vagina before ejaculation.
  • Withdrawal involves the removal of the penis from the vagina during intercourse, before ejaculation occurs; it has a failure rate of 27%.
  • The high failure rate is due to the possible presence of sperm in the bulbourethral gland's secretion, which may enter the vagina prior to removing the penis.

• Chlamydia

  • In men, infection of the urethra (urethritis) is usually symptomatic, causing a white discharge from the penis with or without pain on urinating (dysuria).
  • Male patients may develop a white, cloudy or watery discharge from the tip of the penis.
  • Symptoms that may occur include: a painful or burning sensation when urinating, an unusual discharge from the penis, swollen or tender testicles, or fever.