gametocyst造句

• Numerous ( 30 to 150 ) oocysts are formed per gametocyst.
• The resulting gametocyst is usually spherical in shape.
• The oocysts leave the gametocyst either via the latter's rupture or via sporoducts.
• Several nuclear divisions involving meiosis, occur to form 4 isogametes within a gametocyst wall.
• Fusion of the gametes leads to numerous zygotes within the gametocyst which is either spherical or bilobed.
• A gametocyst wall forms around each pair of gamonts which then begin to divide into hundreds of gametes.
• It is distinguished from the Gregarinicae by the lack of formation of association between the parasites before gametocyst formation.
• Hundreds of oocysts accumulate within each gametocyst and these are released via host's faeces or via host death and decay.
• Within the gametocyst the gamonts give rise to gametes which may be of similar size ( isogametes ) or different sizes ( anisogametes ).
• The gametocyst enlarges from 5 to 15 祄 in length while the gametocytes undergo nuclear division and the nuclei arrange themselves around the perimeter of the gametocytes except at the interface between the two cells.