Sex organ

(Redirected from Genital)
Jump to navigation Jump to search

WikiDoc Resources for Sex organ


Most recent articles on Sex organ

Most cited articles on Sex organ

Review articles on Sex organ

Articles on Sex organ in N Eng J Med, Lancet, BMJ


Powerpoint slides on Sex organ

Images of Sex organ

Photos of Sex organ

Podcasts & MP3s on Sex organ

Videos on Sex organ

Evidence Based Medicine

Cochrane Collaboration on Sex organ

Bandolier on Sex organ

TRIP on Sex organ

Clinical Trials

Ongoing Trials on Sex organ at Clinical

Trial results on Sex organ

Clinical Trials on Sex organ at Google

Guidelines / Policies / Govt

US National Guidelines Clearinghouse on Sex organ

NICE Guidance on Sex organ


FDA on Sex organ

CDC on Sex organ


Books on Sex organ


Sex organ in the news

Be alerted to news on Sex organ

News trends on Sex organ


Blogs on Sex organ


Definitions of Sex organ

Patient Resources / Community

Patient resources on Sex organ

Discussion groups on Sex organ

Patient Handouts on Sex organ

Directions to Hospitals Treating Sex organ

Risk calculators and risk factors for Sex organ

Healthcare Provider Resources

Symptoms of Sex organ

Causes & Risk Factors for Sex organ

Diagnostic studies for Sex organ

Treatment of Sex organ

Continuing Medical Education (CME)

CME Programs on Sex organ


Sex organ en Espanol

Sex organ en Francais


Sex organ in the Marketplace

Patents on Sex organ

Experimental / Informatics

List of terms related to Sex organ

Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]


A sex organ, or primary sexual characteristic, as narrowly defined, is any of those anatomical parts of the body which are involved in sexual reproduction and constitute the reproductive system in a complex organism; namely:

The Latin term genitalia, sometimes anglicized as genitals and genital area, is used to describe the externally visible sex organs, known as primary genitalia or external genitalia: in males the penis and scrotum, in females the clitoris and vulva.

The other, hidden sex organs are referred to as the secondary genitalia or internal genitalia. The most important of these are the gonads a pair of sex organs, specifically the testes in the male or the ovaries in the female. Gonads are the true sex organs, generating reproductive gametes containing inheritable DNA. They also produce most of the primary hormones that affect sexual development, and regulate other sexual organs and sexually differentiated behaviors.

A more ambiguously defined term is erogenous zone, subjectively, any portion of the body that when stimulated produces erotic sensation, but always prominently including the genitalia.


In typical prenatal development, sexual organs originate from a common anlage anatomy during early gestation and differentiate into male or female variations. The SRY gene, usually located on the Y chromosome and encoding the testis determining factor, determines the direction of this differentiation. The absence of it allows the gonads to continue to develop into ovaries.

Thereafter, the development of the internal reproductive organs and the external genitalia is determined by hormones produced by certain fetal gonads (ovaries or testes) and the cells' response to them. The initial appearance of the fetal genitalia (a few weeks after conception) looks basically feminine: a pair of "urogenital folds" with a small protuberance in the middle, and the urethra behind the protuberance. If the fetus has testes, and if the testes produce testosterone, and if the cells of the genitals respond to the testosterone, the outer urogenital folds swell and fuse in the midline to produce the scrotum; the protuberance grows larger and straighter to form the penis; the inner urogenital swellings grow, wrap around the penis, and fuse in the midline to form the penile urethra.

Each sexual organ in one sex has a homologous counterpart in the other one. See a list of homologues of the human reproductive system.

In a larger perspective, the whole process of sexual differentiation also includes development of secondary sexual characteristics such as patterns of pubic and facial hair and female breasts that emerge at puberty. Furthermore, differences in brain structure arises, affecting, but not absolutely determining, behavior.

Anatomical terms related to sex

The following is a list of anatomical terms related to sex and sexuality:

Template:Human anatomical features Template:Organ systems

Template:WikiDoc Sources