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In human anatomy, the penis (/ ˈpiːnɪs /; pl.: penises or penes; from the Latin pēnis, initially "tail" [1]) is an external male sex organ (intromittent organ) that serves as a passage for urine during urination and semen during ejaculation. The main parts are the root, body, the epithelium of the penis including the shaft skin, and the ...
A penis (/ ˈpiːnɪs /; pl.: penises or penes) is a male sex organ that is used to inseminate female or hermaphrodite animals during copulation. [1][2] Such organs occur in both vertebrates and invertebrates, but not in all male animals. The term penis applies to many intromittent organs, but not to all.
An adult penis that is abnormally small but otherwise normally formed is referred to in medicine as a micropenis, with the cutoff usually being defined as around 3 inches (7.6 cm). A large, uncircumcised human penis, flaccid and erect. Flaccid length is a poor predictor for erect length.
Erection. Three columns of erectile tissue make up most of the volume of the penis. An erection (clinically: penile erection or penile tumescence) is a physiological phenomenon in which the penis becomes firm, engorged, and enlarged. Penile erection is the result of a complex interaction of psychological, neural, vascular, and endocrine factors ...
The embryonic and prenatal development of the male reproductive system is the process whereby the reproductive organs grow, mature and are established. It begins with a single fertilized egg and culminates 38 weeks later with the birth of a male child. It is a part of the stages of sexual differentiation.
In male human anatomy, the glans penis or penile glans, [1] commonly referred to as the glans, (/ ɡ l æ n z /; from Latin glans meaning "acorn") [2] is the bulbous structure at the distal end of the human penis that is the human male's most sensitive erogenous zone and primary anatomical source of sexual pleasure.
Penile raphe. The penile raphe is a visible line or ridge of tissue that runs on the ventral (urethral) side of the human penis beginning from the base of the shaft and ending in the prepuce between the penile frenulum. [1][2] The line is typically darker than the rest of the shaft skin, even though its shape and pigmentation may vary greatly ...
Anatomical terminology. [edit on Wikidata] The body or shaft of the penis is the free portion of the human penis that is located outside of the pelvic cavity. [1] It is the continuation of the internal root, which is embedded in the pelvis and extends to the glans. [2] It is made up of the two corpora cavernosa and the corpus spongiosum on the ...