Apicomplexan life cycle
（重定向自Bradyzoite）
![Cellular structure of a typical, generalised apicomplexan: 1-polar ring, 2-conoid, 3-micronemes, 4-rhoptries, 5-nucleus, 6-nucleolus, 7-mitochondria, 8-posterior ring, 9-alveoli, 10-golgi apparatus, 11-micropore.](/Images/godic/202501/01/Apicomplexa_structure.svg4826.png")
![An ookinete (motile), a sporozoite (motile) and a merozoite (non-motile) of Plasmodium falciparum.](/Images/godic/202501/01/Ookinete,_sporozoite,_merozoite4826.png")
![Two tachyzoites of Toxoplasma gondii, transmission electron microscopy[7]](/Images/godic/202501/01/lossy-page1-220px-Parasite140105-fig3_Toxoplasmosis_in_a_bar-shouldered_dove_-_TEM_of_2_tachyzoites.tif4826.jpg")
![](/Images/godic/202501/01/Babesia_life_cycle_human_en.svg4826.png")
Apicomplexans, a group of intracellular parasites, have life cycle stages evolved to allow them to survive the wide variety of environments they are exposed to during their complex life cycle. Each stage in the life cycle of an apicomplexan organism is typified by a cellular variety with a distinct morphology and biochemistry.