'''Triploblasty''' adalah kondisi [[gastrulasi]] di mana terdapat tiga [[lapisan germinal]] primer: [[ektoderm]], [[mesoderm]], dan [[endoderm]]. [[Sel nutfah]] disisihkan dalam embrio pada tahap [[blastula]], yang dimasukkan ke dalam gonad selama [[organogenesis]]. Lapisan kuman terbentuk selama [[gastrulasi]] blastula. Istilah ''triploblast'' dapat mengacu pada [[sel telur]] mana pun di mana [[blastoderm]] terbagi menjadi tiga lapisan.<ref>{{cite book|last=Ravichandra|date=Jan 1, 2008|url=https://books.google.com/books?id=JPMPM3PRbQwC&q=the+term+may+refer+to+an+ovum+in+which+the+blastoderm+splits+into+three+layers&pg=PA29|title=Plant Nematology|publisher=I. K. International Pvt Ltd|isbn=9788189866617|pages=29}}</ref>
__PENGALIHANSTATIK__
Semua [[bilateria]], hewan dengan embrio simetris bilateral, bersifat triploblastik. Taksa hewan lainnya, [[Ctenophora|ctenophores]], [[Placozoa|placozoans]] dan [[Cnidaria|cnidarians]], adalah [[Diploblasti|diploblastik]], artinya embrio mereka hanya mengandung dua lapisan germinal. [[Porifera]] bahkan kurang terspesialisasi secara perkembangan, tidak memiliki [[Jaringan (biologi)|jaringan]]<ref name="Hooper">{{cite web|last=Hooper|first=John|year=2018|title=Structure of Sponges|url=https://www.qm.qld.gov.au/microsites/biodiscovery/03sponges-and-corals/structure-of-sponges.html|website=Queensland Museum|archive-url=https://web.archive.org/web/20190926205031/https://www.qm.qld.gov.au/microsites/biodiscovery/03sponges-and-corals/structure-of-sponges.html|archive-date=26 September 2019|access-date=27 September 2019|url-status=dead}}</ref> and [[Organ (anatomi)|organ]].<ref>{{cite journal|last1=Thacker|first1=Robert W|last2=Diaz|first2=Maria Christina|date=8 September 2014|title=The Porifera Ontology (PORO): enhancing sponge systematics with an anatomy ontology|journal=J Biomed Semantics|volume=5|issue=39|pages=39|doi=10.1186/2041-1480-5-39|pmc=4177528|pmid=25276334}}</ref>
__TANPASUNTINGANBAGIAN__
Triploblas paling awal diperkirakan telah berevolusi dari [[diploblas]] beberapa waktu di [[Proterozoikum]], membentuk diri mereka sebagai kelompok sebelum diversifikasi selama [[letusan Kambrium]].<ref>{{cite journal|last1=Gu|first1=Xun|date=1998|title=Early metazoan divergence was about 830 million years ago|journal=Journal of Molecular Evolution|volume=47|issue=3|pages=369–371|bibcode=1998JMolE..47..369G|doi=10.1007/PL00013150|pmid=9732464|s2cid=30228208}}</ref><ref>{{cite journal|last1=Lynch|first1=Michael|date=1999|title=The age and relationships of the major animal phyla|journal=Evolution|volume=53|issue=2|pages=319–325|doi=10.1111/j.1558-5646.1999.tb03768.x|pmid=28565434|s2cid=6120649|doi-access=free}}</ref><ref>{{cite journal|last1=Seilacher|first1=Adolf|last2=Pradip K.|first2=Bose|last3=Pflüger|first3=Friedrich|date=1998|title=riploblastic animals more than 1 billion years ago: trace fossil evidence from India.|journal=Science|volume=282|issue=5386|pages=80–83|bibcode=1998Sci...282...80S|doi=10.1126/science.282.5386.80|pmid=9756480}}</ref>
