Ebook Embryology at a glance: Part 2
➤ Gửi thông báo lỗi ⚠️ Báo cáo tài liệu vi phạmNội dung chi tiết: Ebook Embryology at a glance: Part 2
Ebook Embryology at a glance: Part 2
Skeletal system (ossification), F^pertrophicigdMM chcndrccyteoPrimary centre of ceoifeatkrinFigure 211Mesenchymal cels condense and form a model of th Ebook Embryology at a glance: Part 2he future bene- PertửiondrùmFigure 21.2Idesenetrymaf cells differentiate into chcndrccyteo, ord the matrtc becomes calcified in the future <«aphy$tePerissteum. bene forming beneathF>re 21.3Blood veoaeb invade. bnryrq presenter cello that become osteoblasts and hA!matcix>etic celsp la phyc o(ĩpiphyữl Ebook Embryology at a glance: Part 2oFigure 214The diaphysis becomes ossAed but the epiphyses remain cartfaginousFigure 215l-dter, the epiphyses also begin to ossifyFigure 21.7MesenchymaEbook Embryology at a glance: Part 2
l cells form a ccndeneatcn between 2 dentloping bonesArticular cartilagePcne (epphysis)Figure 2Ỉ.6with the epiphyses atd diaphysis ossified. the bone Skeletal system (ossification), F^pertrophicigdMM chcndrccyteoPrimary centre of ceoifeatkrinFigure 211Mesenchymal cels condense and form a model of th Ebook Embryology at a glance: Part 21^Mesenchymal celb become organced into layers, and differentiate r>to different cell types, in this case the tissues of a synovia jo’ntJoint demlopmentEnHiryology ar a Gtóncc. First Edition. Samuel Webster and Rhiamon de Wreede.50 © 2012 John Wiley & Sons. Ltd. Published 2012 by John Wiley a Sons. Ebook Embryology at a glance: Part 2Ud.Time period: week 5 to adultIntroductionMesodermal cells form most bones and cartilage. Initially an embryonic, loosely organised connective tissueEbook Embryology at a glance: Part 2
forms from mesodenn throughout the embryo, referred to as mesenchyme. Neural crest cells that migrate into the pharyngeal arches arc also involved inSkeletal system (ossification), F^pertrophicigdMM chcndrccyteoPrimary centre of ceoifeatkrinFigure 211Mesenchymal cels condense and form a model of th Ebook Embryology at a glance: Part 2of mesenchymal cells may group together and become tightly packed (condensed). forming a template for a future bone. This is the start of endochondral ossification (Figure 21.1). Alternatively, an area of mesenchyme may form a hollow sleeve roughly in the shape of the future bone. This is how intram Ebook Embryology at a glance: Part 2embranous ossification begins.Long bones form by endochondral ossification (c.g. femur, phalanges) and flat bones form by intramembranous ossificationEbook Embryology at a glance: Part 2
(c.g. parietal bones, mandible).Endochondral ossificationThe cells of the early mesenchymal model of the future bone differentiate to become CartilagSkeletal system (ossification), F^pertrophicigdMM chcndrccyteoPrimary centre of ceoifeatkrinFigure 211Mesenchymal cels condense and form a model of th Ebook Embryology at a glance: Part 2ification, and the chondrocytes here enter hypertrophy (Figure 21.2). As they become larger they enable calcification of the surrounding extracellular matrix, and then die by apoptosis. Ebook Embryology at a glance: Part 2Skeletal system (ossification), F^pertrophicigdMM chcndrccyteoPrimary centre of ceoifeatkrinFigure 211Mesenchymal cels condense and form a model of thGọi ngay
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