Just my two cents: Cytotrophoblast, primary stem villus, syncytiotrophoblast, and trophoblastic lacunae are all components of the developing placenta, which supplies the fetus in utero. These structures are all derived from the trophoblast, which is considered extra-embryonic tissue. "Hematopoietic stem cells" is the only answer choice that would indicate fetal parts were formed.
iTsh si na mclniteeop itadrofdhiym o.lme yhTe tnaocin epnitclmoe etfla srtap dungliinc mset sellc iwchh are ortsyim adn veig eisr ot urcnreuutdst isue.st
I owkn atth ocemplet oselm do ton tncnaio talfe suiset .e(.i lnyo rncoichio s,ulvil rsct,toyobhaolpt nda rssclcsoytnooitay)bhp nad alipatr eoml as etlfa iessut, ocnirihoc lisvu,l actsltobptoyoh,r and hsiplayoo.brncoysttc vibOsulyo pcetotieimhoa mets ellsc ear felat srtap as teyh ntur tnio oldbo cl,lse ubt hwat is hte aovlrle nfontediii of aeltf st?par