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The proportion of gases in the pneumatocysts adjusts by equilibrating with the surrounding air or water. The pneumatocyst can hold O2, CO2 and CO.
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Pneumatocyst — Pneu*mat o*cyst, n. [Pneumato + cyst.] (Zo[ o]l.) A cyst or sac of a siphonophore, containing air, and serving as a float, as in Physalia. [1913 Webster] … The Collaborative International Dictionary of English
pneumatocyst — /noo mat euh sist, nyoo , nooh meuh teuh , nyooh /, n. Biol. 1. the cavity of a pneumatophore. 2. pneumatophore. [1855 60; PNEUMATO + CYST] * * * … Universalium
pneumatocyst — pneu·ma·to·cyst … English syllables
pneumatocyst — pneu•mat•o•cyst [[t]nʊˈmæt ə sɪst, nyʊ [/t]] n. bot pneumatophore • Etymology: 1855–1860 … From formal English to slang
pneumatocyst — ˌsist noun Etymology: pneumat + cyst 1. : the cavity of a pneumatophore 2. : pneumatophore 1 … Useful english dictionary
Lessoniaceae — Taxobox name = Lessoniaceae image width = 200px image caption = Macrocystis pyrifera domain = Eukaryota regnum = Chromalveolata phylum = Heterokontophyta classis = Phaeophyceae ordo = Laminariales familia = LessoniaceaeLessoniaceae are a family… … Wikipedia
Brown algae — Temporal range: 150–0 Ma[1][2] … Wikipedia
Porpita — Por pi*ta, n. [NL., from Gr. ? brooch.] (Zo[ o]l.) A genus of bright colored Siphonophora found floating in the warmer parts of the ocean. The individuals are round and disk shaped, with a large zooid in the center of the under side, surrounded… … The Collaborative International Dictionary of English
Cnidocyte — Not to be confused with Pneumatocyst. Nomarski micrograph of a Ruthenium red stained nematocyst from Aiptasia pallida, the pale anemone. The red dye stains the polyanionic venom proteins found inside the capsule of this partially discharged… … Wikipedia
Kelp — Taxobox name =Kelp image width = 270px image caption = Californian kelp forest domain = Eukaryota regnum = Chromalveolata phylum = Heterokontophyta classis = Phaeophyceae ordo = Laminariales ordo authority = Migula subdivision ranks = Families… … Wikipedia
