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Archegonium
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<p>An archegonium (pl.: archegonia), from the <a href="/facts/Ancient_Greek/LIK7NlUh">Ancient Greek</a> <i>ἀρχή</i> ("beginning") and <i>γόνος</i> ("offspring"), is a multicellular structure or organ of the <a href="/facts/Gametophyte/g1zag3Su">gametophyte</a> phase of certain <a href="/facts/Plant/X5BMDMvS">plants</a>, producing and containing the <a href="/facts/Ovum/gJyW3W3W">ovum</a> or female <a href="/facts/Gamete/j8e8fls6">gamete</a>. The corresponding male organ is called the <a href="/facts/Antheridium/MFMqmkMv">antheridium</a>. The archegonium has a long neck canal or venter and a swollen base. Archegonia are typically located on the surface of the plant <a href="/facts/Thallus/4FbF7wmC">thallus</a>, although in the <a href="/facts/Hornwort/NLDvbs9G">hornworts</a> they are embedded. </p>