A report on Penis and Human penis

Mallard pseudo-penis
A flaccid penis, with surrounding pubic hair removed to show anatomical detail
Females have corkscrew vaginas with many blind pockets designed for difficult penetration and to prevent becoming pregnant. This reduced the likelihood of fertilization by unwanted aggressors in favor of fitter mates.
Lateral cross section of the penis
External male genitalia of a Labrador Retriever
Anatomical diagram of a human penis
Penises of minke whales on display at the Icelandic Phallological Museum
Various sized penises
Genitorinary system of a raccoon (Procyon lotor)
Stages in the development of the male external genitalia
Penis of a human, with pubic hair removed to show anatomical detail
A urinating puer mingens by Annibale Carracci, 1600, Palazzo Farnese
The spine-covered penis of Callosobruchus analis, a bean weevil
The development of a penile erection, also showing the foreskin gradually retracting over the glans. 
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See also: Commons image gallery''
A ventral view of a penis flaccid (left) and erect (middle); a dorsal view of a penis erect (right).
Hypospadias
Kanamara Matsuri festival in Japan
Papuan man wearing traditional penis sheath
A labelled dorsal view of a circumcised penis: (1) Shaft, (2) Circumcision scar, (3) Corona, (4) Glans, (5) Meatus.
Dissection showing the fascia of the penis as well as several surrounding structures
Image showing innervation and blood-supply of the human male external genitalia

The main parts are the root (radix); the body (corpus); and the epithelium of the penis including the shaft skin and the foreskin (prepuce) covering the glans penis.

- Human penis

In comparison, the human penis is larger than that of any other primate, both in proportion to body size and in absolute terms.

- Penis
Mallard pseudo-penis

4 related topics with Alpha

Overall

Baculum of a dog's penis; the arrow shows the urethral sulcus.

Baculum

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Baculum of a dog's penis; the arrow shows the urethral sulcus.
A raccoon baculum
Walrus baculum, around 22 in long

The baculum (also penis bone, penile bone, or os penis, os genitale or os priapi ) is a bone found in the penis of many placental mammals.

It is absent from the human penis, but present in the penises of some primates, such as the gorilla and chimpanzee.

The internal anatomy of the human vulva, with the clitoral hood and labia minora indicated as lines. The clitoris extends from the visible portion to a point below the pubic bone.

Clitoris

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Female sex organ present in mammals, ostriches and a limited number of other animals.

Female sex organ present in mammals, ostriches and a limited number of other animals.

The internal anatomy of the human vulva, with the clitoral hood and labia minora indicated as lines. The clitoris extends from the visible portion to a point below the pubic bone.
Stages in the development of the clitoris
Created by Helen O'Connell using MRI, the first 3D image of a clitoris in an erect state with the adjacent organs of the uterus and urinary bladder
Clitoris; deep dissection
A partially exposed clitoral glans, which can't be fully exposed due to a mild case of adhesions to the clitoral hood
Structures of the vulva, including external and internal parts of the clitoris
The clitoral hood has a normal anatomical variation in size and appearance in different adult women: while it is completely covered by the labia majora in some women, standing with their legs closed, in others it is pronounced and clearly visible.
Clitoral hood (1) and clitoris (2). Labia are spread apart on the bottom image.
An enlarged clitoris due to clitoromegaly
De re anatomica
A Georg Ludwig Kobelt illustration of the anatomy of the clitoris
Girl protesting for clitoris-awareness at a women's rights rally in Paris, 2019
With a urogenital system in which the female urinates, mates and gives birth via an enlarged, erectile clitoris, female spotted hyenas are the only female mammals devoid of an external vaginal opening.
Male and female reproductive systems of the spotted hyena, from Schmotzer & Zimmerman, Anatomischer Anzeiger (1922). Abb. 1 (Fig. 1.) Male reproductive anatomy. Abb. 2 (Fig. 2.) Female reproductive anatomy. Principal abbreviations (from Schmotzer & Zimmerman) are: T, testis; Vd, vas deferens; BU, urethral bulb; Ur, urethra; R, rectum; P, penis; S, scrotum; O, ovary; FT, tuba Fallopii; RL, ligament uteri; Ut, uterus; CC, Corpus clitoris. Remaining abbreviations, in alphabetical order, are: AG, parotid analis; B, vesica urinaria; CG, parotid Cowperi; CP, Corpus penis; CS, corpus spongiosum; GC, glans; GP, glans penis; LA, levator ani muscle; Pr, prepuce; RC, musculus retractor clitoris; RP, Musculus retractor penis; UCG, Canalis urogenital.

Unlike the penis, the male homologue (equivalent) to the clitoris, it usually does not contain the distal portion (or opening) of the urethra and is therefore not used for urination.

With regard to nerve endings, the human clitoris's estimated 8,000 or more (for its glans or clitoral body as a whole) is commonly cited as being twice as many as the nerve endings found in the human penis (for its glans or body as a whole) and as more than any other part of the human body.

Three columns of erectile tissue make up most of the volume of the penis.

Erection

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Three columns of erectile tissue make up most of the volume of the penis.
8 stages of erection
Various erection angle and shape of penises.
An erect horse penis

An erection (clinically: penile erection or penile tumescence) is a physiological phenomenon in which the penis becomes firm, engorged, and enlarged.

Though the size of a penis varies considerably between males, the average length of an erect human penis is 13.12 cm (5.17 inches), while the average circumference of an erect human penis is 11.66 cm (4.59 inches).

Human glans penis (dorsal view)

Glans penis

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Human glans penis (dorsal view)
The male anatomy showing the location of the glans penis
Internal anatomy of human glans penis: 1. Fascia penis 2. Corpus cavernosum 3. Coronal sulcus 4. Corona of glans 5. Foreskin 6. Glans penis 7. Meatus of the urethra 8. Navicular fossa of male urethra 9. Tunica albuginea of penis 10. Corpus spongiosum 11. Urethra

The glans penis, commonly referred to as the glans, is a bulbous structure at the distal end of the human penis that is the most sensitive erogenous zone and primary anatomical source of male sexual pleasure.

In comparison, the glans of felids is short and spiny, while that of viverrids is smooth and long.