{"id":20899,"date":"2025-06-14T20:31:02","date_gmt":"2025-06-14T20:31:02","guid":{"rendered":"https:\/\/gaviki.com\/blog\/?p=20899"},"modified":"2025-06-14T20:31:21","modified_gmt":"2025-06-14T20:31:21","slug":"the-placenta-is-formed-from-the-__-of-the-embryo","status":"publish","type":"post","link":"https:\/\/gaviki.com\/blog\/the-placenta-is-formed-from-the-__-of-the-embryo\/","title":{"rendered":"The placenta is formed from the __ of the embryo"},"content":{"rendered":"\n<p>The placenta is formed from the <strong>__<\/strong> of the embryo. <\/p>\n\n\n\n<p>A inner cell mass <\/p>\n\n\n\n<p>B mesoderm <\/p>\n\n\n\n<p>C chorionic villi <\/p>\n\n\n\n<p>D endoderm<\/p>\n\n\n\n<p><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-cyan-blue-color\"><strong>The correct answer and explanation is:<\/strong><\/mark><\/p>\n\n\n\n<p><strong>Correct Answer: C. Chorionic villi<\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p><strong>Explanation:<\/strong><\/p>\n\n\n\n<p>The placenta is a vital organ that forms during pregnancy to facilitate the exchange of nutrients, gases, and waste products between the mother and the developing fetus. It also plays important roles in hormone production and immune protection. The placenta is a combined structure composed of tissues from both the mother and the embryo. From the fetal side, it originates specifically from the <strong>chorionic villi<\/strong>, which are finger-like projections that emerge from the chorion \u2014 one of the outermost membranes formed by the embryo.<\/p>\n\n\n\n<p>The chorion is derived from the <strong>trophoblast<\/strong> layer of the blastocyst. As the trophoblast invades the uterine wall, it differentiates into two layers: the <strong>cytotrophoblast<\/strong> and the <strong>syncytiotrophoblast<\/strong>. The syncytiotrophoblast invades maternal tissues and contributes to the formation of the chorionic villi, which penetrate into the maternal endometrium (the lining of the uterus). These villi increase the surface area for exchange between maternal and fetal blood, forming the fetal part of the placenta.<\/p>\n\n\n\n<p>The <strong>inner cell mass<\/strong> (Option A) gives rise to the embryo proper, but not directly to the placenta.<br>The <strong>mesoderm<\/strong> (Option B) is one of the three germ layers that contribute to many body systems but does not form the placenta directly.<br>The <strong>endoderm<\/strong> (Option D) forms internal organs like the digestive and respiratory tracts, and also does not contribute to the placenta.<\/p>\n\n\n\n<p>Thus, <strong>Option C, chorionic villi<\/strong>, is the most accurate answer because they are the structures from which the embryonic portion of the placenta develops. They are essential for the establishment of the maternal-fetal interface and ensure the survival and growth of the embryo throughout pregnancy.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>The placenta is formed from the __ of the embryo. A inner cell mass B mesoderm C chorionic villi D endoderm The correct answer and explanation is: Correct Answer: C. Chorionic villi Explanation: The placenta is a vital organ that forms during pregnancy to facilitate the exchange of nutrients, gases, and waste products between the [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-20899","post","type-post","status-publish","format-standard","hentry","category-quiz-questions"],"_links":{"self":[{"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/posts\/20899","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/comments?post=20899"}],"version-history":[{"count":1,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/posts\/20899\/revisions"}],"predecessor-version":[{"id":20900,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/posts\/20899\/revisions\/20900"}],"wp:attachment":[{"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/media?parent=20899"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/categories?post=20899"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/tags?post=20899"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}