What's in semen?

Answer 1

IN SEMEN :
Approximately 200- to 500-million spermatozoa (also called sperm or spermatozoans), produced in the testes, are released per ejaculation. However, they make up only about 2–5% of the volume of semen. The bulk of the semen is composed of seminal plasma, the fluid portion of semen. This fluid is contributed by the accessory male reproductive organs. Some 60% of the volume of ejaculate is produced by the seminal vesicles, and most of the remainder is generated by the prostate. A small amount of viscous mucus secreted by the bulbourethral glands contributes to the cohesive jelly-like texture of semen.

Seminal plasma of humans contains a complex range of organic and inorganic constituents. They include metal and salt ions, sugars, lipids, steroid hormones, enzymes, prostaglandin hormones, amino acids and basic amines. 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 (which is harmful to sperm), and protect DNA inside the sperm from acidic denaturation. Salts and metal ions in the semen help to create a more hospitable environment for the sperm in the vaginal canal. A typical ejaculation can contain up to 5 mg of zinc. Zinc serves to help to stabilize the DNA-containing chromatin in the sperm cells. A zinc deficiency may result in lowered fertility because of increased sperm fragility. Zinc deficiency can also adversely affect spermatogenesis.

The simple sugar fructose is the main energy source of sperm cells, which rely entirely on sugars from the seminal plasma for energy. Other components of semen (mucus and texturizing proteins) serve to increase the mobility of sperm cells in the vagina and cervix by creating a less viscous channel for the sperm cells to swim through, and preventing their diffusion out of the semen. Prostaglandin hormones are involved in suppressing an immune response by the female against the foreign semen.

Answer 2

Sperm, obviously, and also various proteins and chemical bases. Women's vaginas are very acidic (not dangerous or anything though lol!), but the semen needs to have a base to neutralize those acids so it won't kill the sperm.

By the way, semen also ALWAYS carries sperm, even if it "spits" just a little bit before you even ejaculate, so always wear a condom if you're going to be in "that" area. Withdrawal is not a perfect method. It's only about 60% effective.

Answer 3

Semen is a fluid that contains spermatozoa. It is secreted by the gonads (sexual glands) of male or hermaphroditic animals, including slugs, for fertilization of female ova. Semen discharged by an animal or human is known as ejaculate, and the process of discharge is called ejaculation. Like blood, semen consists of two parts, the cellular part (spermatozoa and in some instances leucocytes and epithelial cells) and noncellular part (seminal plasma).

Answer 4

Semen is a fluid that contains spermatozoa. It is secreted by the gonads (sexual glands) of male or hermaphroditic animals, including slugs, for fertilization of female ova. Semen discharged by an animal or human is known as ejaculate, and the process of discharge is called ejaculation. Like blood, semen consists of two parts, the cellular part (spermatozoa and in some instances leucocytes and epithelial cells) and noncellular part (seminal plasma).
, spermatozoa can fertilize ova externally or internally. In external fertilization, the spermatozoa fertilize the ova directly, outside of the female's sexual organs. Female fish, for example, spawn ova into their aquatic environment, where they are fertilized by the semen of the male fish.

During internal fertilization, however, fertilization occurs inside the female's sexual organs. Internal fertilization takes places after insemination of a female by a male through copulation. In low vertebrates (amphibians, reptiles, birds and monotreme mammals), copulation is achieved through the physical mating of the cloaca of the male and female. In marsupial and placental mammals, copulation occurs through the vagina.

Mammalian semen is a whitish, milky fluid, very viscous, containing water and small amounts of salt, vitamin D, protein, and fructose. The plasma portion of semen may contain dissolved water- and fat-soluble constituents, depending on the diet of the organism in question.

Answer 5

Whats In Semen

Answer 6

Semen contains fructose (which provides for enerygy in swimming), prostaglandins ( helps sperm break through the uterus), enzymes ( for energy, movement) and seminalplasmin ( contains antibiotic which destroys some bacteria) and finally fibrinogen ( help sperm to swim out of the sticky mess).

Answer 7

Here ya go...

http://en.wikipedia.org/wiki/Semen

Answer 8

Millions of sperms!!
alongwith some alkaline fluid with many diff. nutrients to keep the sperms healthy!

Answer 9

Sperm, seminal plasma, and viscous mucous. Check the link for more information.

Answer 10

http://en.wikipedia.org/wiki/Semen