"Ova" redirects here. For other uses, see Ova (disambiguation).
Female reproductive cell in most anisogamous organisms
Not to be confused with Egg.
Egg cell
A human egg cell with surrounding corona radiata
Details
Identifiers
Latin
ovum
Greek
Ωάριο (oário)
MeSH
D010063
FMA
67343
Anatomical terms of microanatomy
[edit on Wikidata]
Human egg cell
The egg cell or ovum (pl.: ova) is the female reproductive cell, or gamete,[1] in most anisogamous organisms (organisms that reproduce sexually with a larger, female gamete and a smaller, male one). The term is used when the female gamete is not capable of movement (non-motile). If the male gamete (sperm) is capable of movement, the type of sexual reproduction is also classified as oogamous. A nonmotile female gamete formed in the oogonium of some algae, fungi, oomycetes, or bryophytes is an oosphere.[2] When fertilized, the oosphere becomes the oospore.[clarification needed]
When egg and sperm fuse during fertilisation, a diploid cell (the zygote) is formed, which rapidly grows into a new organism.
^"Ovum". Biology Dictionary. BiologyOnline. 7 October 2019. Retrieved 21 January 2023.
^"Oosphere Meaning". YourDictionary. Retrieved 12 April 2021.
The eggcell or ovum (pl.: ova) is the female reproductive cell, or gamete, in most anisogamous organisms (organisms that reproduce sexually with a larger...
and most other anisogamous organisms, a zygote is formed when an eggcell and sperm cell come together to create a new unique organism. The formation of...
An egg is an organic vessel grown by an animal to carry a possibly fertilized eggcell (a zygote) and to incubate from it an embryo within the egg until...
biology, somatic cell nuclear transfer (SCNT) is a laboratory strategy for creating a viable embryo from a body cell and an eggcell. The technique consists...
called the embryo sac in angiosperms. The megagametophyte produces an eggcell for the purpose of fertilization. The ovule is a small structure present...
cells, 2 synergids & 1 eggcell. One sperm fertilizes the eggcell and the other sperm combines with the two polar nuclei of the large central cell of...
sperm or eggcell during the process of fertilization. The sperm cell undergoes a transformation into a pronucleus after entering the eggcell but prior...
cracks open at the trilete suture to allow the male gametes to access the eggcells in the archegonia inside. The gametophytes of Isoetes appear to be similar...
after fusion with eggcells during fertilization, a new organism begins developing, starting as a totipotent zygote. The human sperm cell is haploid, so...
invertebrates, the yolk material is not in a special organ, but inside the eggcell. As stored food, yolks are often rich in vitamins, minerals, lipids and...
antheridium and the eggcells by mitosis in a flask-shaped organ called the archegonium. Plant sperm cells are their only motile cells, often described as...
fallopian tube into the uterus. If an eggcell meets with sperm on its way to the uterus, a single sperm cell can enter and merge with it, fertilizing...
oögenesis (/ˌoʊ.əˈdʒɛnɪsɪs/) is the differentiation of the ovum (eggcell) into a cell competent to further develop when fertilized. It is developed from...
directly from an egg, without need for fertilisation. In animals, parthenogenesis means development of an embryo from an unfertilized eggcell. In plants,...
refers to the total number of chromosomes found in a gamete (a sperm or eggcell produced by meiosis in preparation for sexual reproduction). Under normal...
the fertilization of an eggcell (ovum) by a sperm cell, (spermatozoon). Once fertilized, the ovum becomes a single diploid cell known as a zygote. The...
(symbol: ♀) if it produces the ovum (eggcell), the type of gamete (sex cell) that fuses with the male gamete (sperm cell) during sexual reproduction. A female...
nucleus disintegrates and the two sperm cells are released; one of the two sperm cells fertilises the eggcell (at the bottom of the gametophyte near the...
flagellum as the egg travels down the fallopian tube to reach the uterus. In vitro fertilization (IVF) is a process by which eggcells are fertilized by...
follicles, each with the potential to release an eggcell (ovum) at ovulation for fertilization. These eggs are developed once every menstrual cycle with...
mitotically and develops into the gametophyte, which eventually produces one eggcell. In the most common type of megagametophyte development in flowering plants...
the female eggcell by the male sperm cell. The resulting fusion of these two cells produces a single-celled zygote that undergoes many cell divisions...
form. The smaller gamete is male, a sperm cell, whereas the larger gamete is female, typically an eggcell. Anisogamy is predominant among multicellular...
than the 405 eggs eaten per person in 1945. During production, eggs can be candled to check their quality. The size of an egg's air cell is determined...
stochastic processes in the cell to increase the cell-to-cell variability in mutant load as an organism develops: a single eggcell with some proportion of...
ovocyte is a female gametocyte or germ cell involved in reproduction. In other words, it is an immature ovum, or eggcell. An oocyte is produced in a female...
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