Information about External Fertilization
External fertilization is a form of fertilization in which a sperm cell is united with an egg cell external to the body of the female. Thus, the fertilization is said to occur "externally". This is distinct from internal fertilization where the union of the egg and sperm occur inside the female after insemination through copulation.
Many aquatic animals reproduce by external fertilization, including fish, whose females spawn ova which are fertilized by the sperm that male fish secrete into the water.
In sexual reproduction, there must be some way of getting the sperm to the egg. Since sperm are designed to be motile in a watery environment, aquatic animals can make use of the water in which they live. In many aquatic animals such as coral or Hydra, eggs and sperm are simultaneously shed into the water, and the sperm swim through the water to fertilize the egg in a process known as broadcast fertilization. In many fish species, including salmon, the female will deposit unfertilized eggs in the substrate and the male will swim by and fertilize them.
Many land plants make use of external fertilization as well. For example, bees and butterflies brush against pollen when gathering nectar from flowers and spread them to another flower of the same species, pollinating that plant.
..... Click the link for more information.
Many aquatic animals reproduce by external fertilization, including fish, whose females spawn ova which are fertilized by the sperm that male fish secrete into the water.
In sexual reproduction, there must be some way of getting the sperm to the egg. Since sperm are designed to be motile in a watery environment, aquatic animals can make use of the water in which they live. In many aquatic animals such as coral or Hydra, eggs and sperm are simultaneously shed into the water, and the sperm swim through the water to fertilize the egg in a process known as broadcast fertilization. In many fish species, including salmon, the female will deposit unfertilized eggs in the substrate and the male will swim by and fertilize them.
Many land plants make use of external fertilization as well. For example, bees and butterflies brush against pollen when gathering nectar from flowers and spread them to another flower of the same species, pollinating that plant.
Fertilization (also known as conception, fecundation and syngamy), is fusion of gametes to form a new organism of the same species. In animals, the process involves a sperm fusing with an ovum, which eventually leads to the development of an embryo.
..... Click the link for more information.
..... Click the link for more information.
sperm is derived from the word spermos (meaning "seed") and refers to the male reproductive cells. Sperm cells are the smaller gametes involved in fertilization.
..... Click the link for more information.
..... Click the link for more information.
ovum (plural ova) is a haploid female reproductive cell or gamete. The word is derived from Latin, meaning egg or egg cell. Both animals and embryophytes have ova. The term ovule
..... Click the link for more information.
..... Click the link for more information.
Female (♀) is the sex of an organism, or a part of an organism, which produces ova (egg cells). The ova are defined as the larger gametes in a heterogamous reproduction system, while the smaller, usually motile gamete, the spermatozoon is produced by the male.
..... Click the link for more information.
..... Click the link for more information.
Internal fertilization is a form of animal fertilization of an ovum by spermatozoon within the body of an inseminated animal, whether female or hermaphroditic. This is distinct from external fertilization, where the union of the ova and spermatoza occur outside of the organism.
..... Click the link for more information.
..... Click the link for more information.
Insemination is the introduction of sperm into the female uterus of a mammal or the oviduct of an oviparous (egg-laying animal) during copulation with another animal.
Artificial insemination is when it is done by some means other than copulation.
..... Click the link for more information.
Artificial insemination is when it is done by some means other than copulation.
..... Click the link for more information.
mating is the pairing of opposite-sex or hermaphroditic internal fertilization animals for copulation and, in social animals, also to raise their offspring. Mating methods include random mating, disassortative mating, assortative mating, or a mating pool.
..... Click the link for more information.
..... Click the link for more information.
- This article is about biological spawning. For other meanings of the word spawn, see Spawn (disambiguation)..
- The word smolt also redirects here.
..... Click the link for more information.
Water is a common chemical substance that is essential to all known forms of life.[1] In typical usage, water refers only to its liquid form or state, but the substance also has a solid state, ice, and a gaseous state, water vapor.
..... Click the link for more information.
..... Click the link for more information.
Corals are marine animals from the class Anthozoa and exist as small sea anemone-like polyps, typically in colonies of many identical individuals. The group includes the important reef builders that are found in tropical oceans, which secrete calcium carbonate to form a hard
..... Click the link for more information.
..... Click the link for more information.
Fertilization (also known as conception, fecundation and syngamy), is fusion of gametes to form a new organism of the same species. In animals, the process involves a sperm fusing with an ovum, which eventually leads to the development of an embryo.
..... Click the link for more information.
..... Click the link for more information.
Salmon is the common name for several species of fish of the family Salmonidae. Several other fish in the family are called trout. Salmon live in both the Atlantic and Pacific Oceans, as well as the Great Lakes and other land locked lakes.
..... Click the link for more information.
..... Click the link for more information.
Male (♂) refers to the sex of an organism, or part of an organism, which produces small mobile gametes, called spermatozoa. Each spermatozoon can fuse with a larger female gamete or ovum, in the process of fertilisation.
..... Click the link for more information.
..... Click the link for more information.
This article is copied from an article on Wikipedia.org - the free encyclopedia created and edited by online user community. The text was not checked or edited by anyone on our staff. Although the vast majority of the wikipedia encyclopedia articles provide accurate and timely information please do not assume the accuracy of any particular article. This article is distributed under the terms of GNU Free Documentation License.
Herod_Archelaus
