In human anatomy, male ejaculation is the propulsive discharge of semen from the penis during orgasm through the urethra.
Male Ejaculation: Definition & Process - WebMD
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Ejaculation refers to the release of semen from the body during climax. It occurs when the muscles around the bladder contract and push semen out of the body through the urethra. This process can take anywhere from a few seconds to several minutes, depending on how long it takes for you to reach orgasm. There are different stages involved in the ejaculatory process that lead up to this final step:
1) Pre-ejaculate: This is also known as pre-cum, or cowper's fluid. It is a clear, sticky substance produced by the Cowper's glands located near the prostate gland. It lubricates the urethra and neutralizes acidity before semen enters it. Pre-ejaculate is usually expelled shortly before ejaculation, but some men may notice that they produce small amounts throughout sex.
2) Emission phase: This is the stage where semen begins to build up in the epididymis, the tube that stores and transports sperm from the testicles. As the emission phase begins, the vas deferens (the tubes that carry sperm from the testicles) begin to contract, pushing the sperm towards the penis.
3) Plateau phase: During this stage, the muscles at the base of the penis start to contract and blood flow increases, causing the shaft to become rigid and erect. The penile arteries fill with blood, while the veins shrink, trapping blood inside the penis. This creates pressure, which causes the testicles to rise closer to the body.
4) Expulsion phase: During the climax, the seminal vesicles (located just above the prostate gland) release their secretions into the urethra. These fluids mix with the sperm to form semen. Simultaneously, the muscles around the prostate and bladder contract, forcing semen out through the tip of the penis. This final stage can last anywhere from a few seconds to several minutes.
Overall, male ejaculation is an essential part of sexual intercourse that plays a crucial role in fertilization. Without it, conception would not be possible.
In summary, the process of male ejaculation involves the emission and expulsion phases, during which semen is produced and released from the body respectively. It occurs when the muscles around the bladder contract and push semen out of the body through the urethra. There are different stages involved in the ejaculatory process leading up to this final step, including pre-ejaculate production, semen build-up, plateau phase contractions, and the expulsion phase. Understanding these steps can help you better understand what happens during sex and why it's so important for reproduction.