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Composition of human semenDuring the process of ejaculation, sperm passes through the ejaculatory ducts and mixes with fluids from the seminal vesicles, the prostate, and the bulbourethral glands to form the semen. The seminal vesicles produce a yellowish viscous fluid rich in fructose and other substances that makes up about 70% of human semen.[1] The prostatic secretion, influenced by dihydrotestosterone, is a whitish (sometimes clear), thin fluid containing proteolytic enzymes, citric acid, acid phosphatase and lipids.[1] The bulbourethral glands secrete a clear secretion into the lumen of the urethra to lubricate it.[2]

Sertoli cells, which nurture and support developing spermatocytes, secrete a fluid into seminiferous tubules that helps transport sperm to the genital ducts. The ductuli efferentes possess cuboidal cells with microvilli and lysosomal granules that modify the semen by reabsorbing some fluid. Once the semen enters the ductus epididymis the principle cells, which contain pinocytotic vessels indicating fluid reabsorption, secrete glycerophosphocholine which most likely inhibits premature capacitation. The accessory genital ducts, the seminal vesicle, prostate glands, and the bulbourethral glands, produce most of the seminal fluid.

Seminal plasma of humans contains a complex range of organic and inorganic constituents.

The seminal plasma provides a nutritive and protective medium for the spermatozoa during their journey through the female reproductive tract. The normal environment of the vagina is a hostile one for sperm cells, as it is very acidic (from the native microflora producing lactic acid), viscous, and patrolled by immune cells. The components in the seminal plasma attempt to compensate for this hostile environment. Basic amines such as putrescine, spermine, spermidine and cadaverine are responsible for the smell and flavor of semen. These alkaline bases counteract the acidic environment of the vaginal canal, and protect DNA inside the sperm from acidic denaturation.

(Source wikipedia)

Semen is made up mostly of seminal fluid, which is a combination of dead epithelial cells, fructose, mucus, proteins, and enzymes and prostatic fluid, which is white milky mucus and contains prostate specific antigen, proteolytic enzymes, acid phosphotase and lipids. The Cowper's glands add a clear fluid.

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13y ago
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15y ago

In humans, when they masturbate to climax and ejaculate a seminal fluid is excreted containing sperm.

The woman's body is highly toxic to sperm and thus a seminal fluid surrounds the sperm to aid it in its travels through the female egg, or ovule.

Seminal fluid is produced by the seminal vesicle, prostate, and bulbourethral glands. It contains a complex mixture of organic and inorganic materials including amino acids.

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11y ago

Semen is made up mostly of seminal fluid, which is a combination of dead epithelial cells, fructose, mucus, proteins, and enzymes and prostatic fluid, which is white milky mucus and contains prostate specific antigen, proteolytic enzymes, acid phosphotase and lipids. The Cowper's glands add a clear fluid.

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12y ago

sperm + fluids from: -prostate gland

-seminal vesicle

-cowper's gland

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11y ago

It has spermatozoa and a protein rich liquid that helps them perform their function.

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Q: What is semen made out of?
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