During embryonic development, which of the following germ layers forms the nervous system?<\/p>\n\n\n\n
A.
Ectoderm<\/p>\n\n\n\n
B.
Endoderm<\/p>\n\n\n\n
C.
Mesoderm<\/p>\n\n\n\n
D.
Exoderm<\/p>\n\n\n\n
The correct answer and Explanation is :<\/strong><\/mark><\/p>\n\n\n\n The correct answer is A. Ectoderm<\/strong>.<\/p>\n\n\n\n During embryonic development, the ectoderm is one of the three primary germ layers, which also include the mesoderm and endoderm. The ectoderm gives rise to a variety of structures, but its most significant contribution is to the formation of the nervous system. This process begins with a phenomenon known as neurulation.<\/p>\n\n\n\n Neurulation is the early stage of nervous system development where the ectoderm forms the neural plate. This plate then folds to create the neural tube, which eventually develops into the brain and spinal cord. The neural crest cells, which originate from the edges of the neural plate, migrate away to form various structures, including peripheral nerves, melanocytes (pigment cells), and some craniofacial structures.<\/p>\n\n\n\n The ectoderm is also responsible for forming the skin and its derivatives, such as hair and nails. Its role in nervous system development is crucial, as any disruptions during this stage can lead to congenital disorders. For instance, failures in the closure of the neural tube can result in conditions like spina bifida or anencephaly, underscoring the importance of proper ectodermal development.<\/p>\n\n\n\n In contrast, the mesoderm gives rise to muscles, bones, and the circulatory system, while the endoderm develops into the internal organs, including the gastrointestinal tract and respiratory system. Each germ layer has specialized functions, but the ectoderm’s role in developing the nervous system is particularly pivotal for establishing the body\u2019s primary communication network, allowing for the coordination of movements, sensory perceptions, and higher cognitive functions. Thus, understanding the ectoderm’s contribution is fundamental in fields like developmental biology and medicine.<\/p>\n","protected":false},"excerpt":{"rendered":" During embryonic development, which of the following germ layers forms the nervous system? A.Ectoderm B.Endoderm C.Mesoderm D.Exoderm The correct answer and Explanation is : The correct answer is A. Ectoderm. During embryonic development, the ectoderm is one of the three primary germ layers, which also include the mesoderm and endoderm. The ectoderm gives rise to […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[25],"tags":[],"class_list":["post-142737","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/142737","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/comments?post=142737"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/142737\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=142737"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=142737"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=142737"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}