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As sperm enter the urethra, the seminal vesicles, prostate gland, and Cowper âs glands all secrete fluids into the urethra. 3 5 Sperm, Cont âd 5. These fluids nourish the sperm and protect them from the acidity of the female reproductive tract6. Semen is the mixture of sperm and fluids7. Involuntary contractions of the muscles force the semen through the urethra, and out of the body in a process called ejaculation 6 Seminal Vesicles 1. Active secretory gland2.
Contrary to popular belief, male ejaculate is not produced exclusively in the testicles. Your testicles are responsible for producing sperm cells that swim in the seminal fluid that is produced in multiple different glands in the male reproductive system. In fact, sperm cells make up only about 1% to 5% of male ejaculate by volume. The remaining 95%+ of ejaculated seminal fluid is there to help propel, feed, and protect those precious sperm cells while they seek an egg to fertilize. ââ. Seminal fluid (semen) is actually produced in a variety of different locations including the testes (1-5%), prostate gland (25-30%), seminal vesicle (65-70%), and the bulbourethral glands (less than 1%).