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The body of the penis consists of three cylindrical-shaped masses of erectile tissue which run the length of the penis. Two of the masses lie alongside each other and end behind the head of the penis. The third mass lies underneath them. This latter mass contains the urethra. The penis terminates in an oval or cone-shaped body, the glans penis, which contains the exterior opening of the urethra.
The glans penis is covered by a loose skin, the foreskin or prepuce, which enables it to expand freely during erection. The skin ends just behind the glans penis and folds forward to cover it. The inner surface of the foreskin contains glands that secrete a lubricating fluid called smegma which makes it easy for the penis to expand and retract past the foreskin.
pe·ni·ses(pē'nis, pē'nēz, pē'nis-ez), [TA]
Veterinary medicine Any of various copulatory organs in males of lower animals
pe·nis, pl. penes, penises (pē'nis, -nēz, -ni-sĕz) [TA]
penis(pe'nis) plural.penises, penes [L.]
The penis is composed mainly of erectile tissue arranged in three columns, the whole being covered with skin. The two lateral columns are the corpora cavernosa penis. The third or median column, known as the corpus spongiosum, contains the urethra. The body is attached to the descending portion of the pubic bone by the crura of the penis. The cone-shaped head of the penis, the glans penis, contains the urethral orifice. It is covered with a movable hood known as the foreskin or prepuce, under which is secreted the substance called smegma.
Hyperemia of the genitals fills the corpora cavernosa with blood as the result of sexual excitement or stimulation, thus causing an erection. The hyperemia subsides following orgasm and ejaculation of the seminal fluid. The organ then returns to its flaccid condition. The size of the flaccid penis does not necessarily correlate with that of the erect penis.
The occult location of the organ can interfere with normal urination and with sexual penetration.
webbed penisPenis palmatus.
penisThe male organ of copulation containing the URETHRA through which urine and seminal fluid pass. The normally flaccid penis becomes enlarged and erect by virtue of three longitudinal cylindrical bodies of spongy tissue into which blood can flow under pressure under the influence of sexual excitement or other stimuli. One of these bodies, the corpus spongiosum, surrounds the urethra. The other two, the corpora cavernosa, lie side by side above the corpus spongiosum. Erection physiology is mediated partly by nitric oxide.
phallusthe copulatory organ of a male animal which conveys the sperm to the genital tract of the female.
Patient discussion about penis
Q. is it possible to enlarge my penis?
Q. what is the avrage 12 yr old penis lengh
Q. Is my penis supposed to look like this? A few years a go I was masturbating and had a sharp pain and stopped. It was swollen. The doctor said it was fine, no structural damage it was probably just irritated. Two years later I still have extra foreskin. It doesn't affect my sex and not noticeable with an erection. I am just curious... what happened?!?!