A hydroid is a type of vascular cell that occurs in certain bryophytes . In some mosses such as members of the Polytrichaceae family, hydroids form the innermost layer of cells in the stem. At maturity they are long, colourless, thin walled cells of small diameter, containing water but no living protoplasm . Collectively, hydroids function as a conducting tissue, known as the hydrome, transporting water and minerals drawn from the soil. They are surrounded by bundles of living cells known as leptoids which carry sugars and other nutrients in solution. The hydroids are analogous to the tracheids of vascular plants but there is no lignin present in the cell walls to provide structural support.
3-526: Hydroid may refer to: Biology [ edit ] Hydroid (botany) , a type of vascular cell that occurs in certain bryophytes Hydroid (zoology) , a life stage for most animals of the class Hydrozoa Garveia , a genus of cnidarians, including: Garveia annulata , the orange hydroid Garveia arborea , the orange or hedgehog hydroid Business [ edit ] Hydroid Inc. , an autonomous underwater vehicle manufacturer Topics referred to by
6-473: Is different from Wikidata All article disambiguation pages All disambiguation pages Hydroid (botany) Hydroids have been found in some fossilised plants from the Rhynie chert , including Aglaophyton , where they were initially mistaken for xylem tracheids. This plant physiology article is a stub . You can help Misplaced Pages by expanding it . This bryophyte -related article
9-411: The same term [REDACTED] This disambiguation page lists articles associated with the title Hydroid . If an internal link led you here, you may wish to change the link to point directly to the intended article. Retrieved from " https://en.wikipedia.org/w/index.php?title=Hydroid&oldid=1254341561 " Category : Disambiguation pages Hidden categories: Short description
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