Definitions for Internal fertilization
in·ter·nal fer·til·iza·tion

WikipediaRate this definition:0.0 / 0 votes

1. Internal fertilization

   Internal fertilization is the union of an egg and sperm cell during sexual reproduction inside the female body. Internal fertilization, unlike its counterpart, external fertilization, brings more control to the female with reproduction. For internal fertilization to happen there needs to be a method for the male to introduce the sperm into the female's reproductive tract. Most taxa that reproduce by internal fertilization are gonochoric.: 124–125  In mammals, reptiles, and certain other groups of animals, this is done by copulation, an intromittent organ being introduced into the vagina or cloaca. In most birds, the cloacal kiss is used, the two animals pressing their cloacas together while transferring sperm. Salamanders, spiders, some insects and some molluscs undertake internal fertilization by transferring a spermatophore, a bundle of sperm, from the male to the female. Following fertilization, the embryos are laid as eggs in oviparous organisms, or continue to develop inside the reproductive tract of the mother to be born later as live young in viviparous organisms.

WikidataRate this definition:2.4 / 5 votes

1. Internal fertilization

   Fertilization which takes place inside the female body is called internal fertilization. Internal fertilization in animals is done through copulation, which involves the insertion of the penis or other intromittent organ into the vagina or to the cloaca in monotremes, most reptiles, some birds, the amphibian tailed frog and some fish, the disappeared dinosaurs, as well as in other non-vertebrate animals. In some birds and in the tuatara, that don't have an intromittent organ, the internal fertilization is done by the means of the cloacal kiss, which consists in that the two animals touch their cloacae together in order to transfer the sperm from the male to the female. At some point, the growing egg or offspring must be expelled. There are three general ways of doing this: ⁕Oviparous organisms, including most insects and reptiles, monotremes, dinosaurs and all birds lay eggs that continue to develop after being laid, and hatch later. ⁕Viviparous organisms, including almost all mammals bear their young live. The developing young spend proportionately more time within the female's reproductive tract. The young are later released to survive on their own, with varying amounts of help from the parent on the species.

How to pronounce Internal fertilization?

1. Alex

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How to say Internal fertilization in sign language?

Numerology

1. Chaldean Numerology

   The numerical value of Internal fertilization in Chaldean Numerology is: 3

2. Pythagorean Numerology

   The numerical value of Internal fertilization in Pythagorean Numerology is: 5

Examples of Internal fertilization in a Sentence

1. Freaky Frog Photos -RSB- McGuire:

   Internal fertilization has evolved independently only four times in frogs.

References

1. ^ Wikipedia
   https://en.wikipedia.org/wiki/Internal_Fertilization
2. ^ Wikidata
   https://www.wikidata.org/w/index.php?search=Internal fertilization