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A blastoid is an embryoid, [1] a stem cell-based embryo model which, morphologically and transcriptionally resembles the early, pre-implantation, mammalian conceptus, called the blastocyst. The first blastoids were created by the Nicolas Rivron laboratory [ 2 ] [ 3 ] by combining mouse embryonic stem cells and mouse trophoblast stem cells.
Blastoids (class Blastoidea) are an extinct type of stemmed echinoderm, often referred to as sea buds. [1] They first appear, along with many other echinoderm classes, in the Ordovician period, and reached their greatest diversity in the Mississippian subperiod of the Carboniferous period. However, blastoids may have originated in the Cambrian.
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Blastoids, an example of a single group of blastozoans. Scientific classification; Domain: Eukaryota: Kingdom: Animalia: Phylum: Echinodermata: Subphylum: † Blastozoa: Classes Class Eocrinoidea (Cambrian - Silurian) Class Parablastoidea ; Class Rhombifera (Ordovician - Devonian) Class Diploporita (Ordovician - Devonian) Class Blastoidea ...
They, like other blastoids, superficially resemble their distant relatives, the crinoids or sea lilies, having a near-identical, planktivorous lifestyle living on the sea floor attached by a stalk. As with all other blastoids, species of Pentremites trapped food floating in the currents by means of tentacle-like appendages.
Cryptoblastus is a genus of extinct blastoids, a primitive group of echinoderms related to the modern sea lilies. [1] Fossils are found in sedimentary rocks laid down in the Early Carboniferous period some 360 to 320 million years ago.
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The Gastruloid model system draws its origins from work by Marikawa et al.. [4] In that study, small numbers of mouse P19 embryonal carcinoma (EC) cells, were aggregated as embryoid bodies (EBs) and used to model and investigate the processes involved in anteroposterior polarity and the formation of a primitive streak region. [4]