Illustration of ejaculate containing sperm cells (spermatozoa, white) and seminal fluid moving into the prostate (pink). During ejaculation, spermatozoa travel from the testes (testicles) to the urethra (hollow tube in the penis), during which secretions are added form several organs for motility and nutrition to form semen. One of these organs is the prostate, which secretes prostatic fluid. Contraction of the muscles in the prostate also prevents urine from mixing with semen.

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Creative#:

TPG34967133

Source:

達志影像

Authorization Type:

RF

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須由TPG 完整授權

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N/A

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N/A

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No

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