A report on Penis and Ejaculation

Mallard pseudo-penis
Ejaculation example
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.
Diagram of the male pelvic and reproductive organs
External male genitalia of a Labrador Retriever
Penises of minke whales on display at the Icelandic Phallological Museum
Genitorinary system of a raccoon (Procyon lotor)
Penis of a human, with pubic hair removed to show anatomical detail
The spine-covered penis of Callosobruchus analis, a bean weevil

A usual precursor to ejaculation is the sexual arousal of the male, leading to the erection of the penis, though not every arousal nor erection leads to ejaculation.

- Ejaculation

The male pronghorn usually ejaculates immediately after intromission.

- Penis
Mallard pseudo-penis

4 related topics with Alpha

Overall

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.

The corpus spongiosum is a single tubular structure located just below the corpora cavernosa, which contains the urethra, through which urine and semen pass during urination and ejaculation respectively.

A stallion

Stallion

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Male horse that has not been gelded .

Male horse that has not been gelded .

A stallion
Mustang stallion (right) with part of his band of mares and foals
Stallion exhibiting the flehmen response
Genitourinary system of a stallion
A stallion's secondary characteristics include heavier muscling for a given breed than is seen in mares or geldings, often with considerable development along the crest of the neck, as shown in this image.
Even well-trained stallions require firm and consistent handling by experienced individuals.
Aggressive and even violent behavior between stallions not habitually living together or in the presence of mares adds to the challenges in stallion management.
Provided with sufficient space and food with no distractions from mares in estrus, even stallions previously used for breeding may coexist peacefully. Not all individuals are suited for this kind of arrangement, however.
Stallions are capable of achieving a high level of discipline and training.

These contribute fluid to the semen at ejaculation, but are not strictly necessary for fertility.

the penis, within the "penile sheath". Stallions have a vascular penis. When non-erect, it is quite flaccid and contained within the sheath. The retractor penis muscle is relatively underdeveloped. Erection and protrusion take place gradually, by the increasing tumescence of the erectile vascular tissue in the corpus cavernosum penis. When not erect, the penis is housed within the prepuce, 50 cm long and 2.5 to 6 cm in diameter with the distal end 15 to 20 cm. The retractor muscle contracts to retract the penis into the sheath and relaxes to allow the penis to extend from the sheath. When erect, the penis doubles in length and thickness and the glans increases by 3 to 4 times. The urethra opens within the urethral fossa, a small pouch at the distal end of the glans. A structure called the urethral process projects beyond the glans.

Martin van Maële's print Francion 15

Sexual arousal

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Sexual arousal (also known as sexual excitement) describes the physiological and psychological responses in preparation for sexual intercourse or when exposed to sexual stimuli.

Sexual arousal (also known as sexual excitement) describes the physiological and psychological responses in preparation for sexual intercourse or when exposed to sexual stimuli.

Martin van Maële's print Francion 15
Two birds that appear to be exhibiting affection

Once this has started, it is likely that the man will continue to ejaculate and orgasm fully, with or without further stimulation.

The ring surrounds the penis, but does not constrict or cause discomfort.

The urethra transports urine from the bladder to the outside of the body. This image shows (a) a female urethra and (b) a male urethra.

Urethra

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Tube that connects the urinary bladder to the urinary meatus for the removal of urine from the body of both females and males.

Tube that connects the urinary bladder to the urinary meatus for the removal of urine from the body of both females and males.

The urethra transports urine from the bladder to the outside of the body. This image shows (a) a female urethra and (b) a male urethra.
The human male urethra laid open on its anterior (upper) surface
Micrograph of urethral cancer (urothelial cell carcinoma), a rare problem of the urethra.
Position of the urethra in males
Transverse section of the penis
Male urethral opening on glans penis
Female urethral opening within vulval vestibule
Muscles of the female perineum
Urethra. Deep dissection. Serial cross section.
Diagram which depicts the membranous urethra and the spongy urethra of a male

Females use their urethra only for urinating, but males use their urethra for both urination and ejaculation.

Its length differs between the sexes, because it passes through the penis in males.