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ejaculation
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Diagram of the human male reproductive system showing the organs involved in the production and transport of semen, including the testis, epididymis, vas deferens, seminal vesicle, prostate, urethra, and penis, with arrows indicating the path of sperm from the testis through the reproductive tract. Diagram illustrating spermatogenesis in male human anatomy, showing a cross-section of the testis with seminiferous tubules, detailed cells at various stages of sperm development, and a flowchart of cell divisions leading from primordial germ cell to mature sperm.
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Diagram of the human male reproductive system showing the organs involved in the production and transport of semen, including the testis, epididymis, vas deferens, seminal vesicle, prostate, urethra, and penis, with arrows indicating the path of sperm from the testis through the reproductive tract.
male reproductive organs Structures involved in the production and transport of semen.

ejaculation

physiology
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ejaculation, the release of sperm cells and seminal plasma from the male reproductive system. Ejaculation takes place in two phases: in the first, or emission, stage, sperm are moved from the testes and the epididymis (where the sperm are stored) to the beginning of the urethra, a hollow tube running through the penis that transports either sperm or urine; in the second stage, ejaculation proper, the semen is moved through the urethra and expelled from...

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