这关键区别在青蛙和鸡胃口之间青蛙胃tion导致空心球胃while chick gastrulation results in a gastrula with flat sheets of cells.此外,青蛙的胃结构始于鸡胃胃肠道,从胚芽开始。
Fertilization is the union of sperm with the egg cell. As the result of this process, aZygoteis formed. The zygote divides bymitosisand produces the morula. Modula undergoes the blastula stage and then comes into the important stage called gastrulation. Gastrulation stage determines the fate of the cell. It will decide what kind of tissues should be made. A single layer of cells converts into the multilayered structure. These cell layers are the primary germ layers namely endoderm, ectoderm and mesoderm in triploblastic organisms. However, the gastrulation process differs among the species. There are differences as well as similarities between the gastrulation of different species in the animal kingdom. Gastrulation of frogs, sea urchins and chicks are well-known processes. After gastrulation, organogenesis begins.
CONTENTS
1。概述和关键差异
2。什么是青蛙胃口
3。什么是鸡胃口
4。Similarities Between Frog and Chick Gastrulation
5。Side by Side Comparison – Frog vs Chick Gastrulation in Tabular Form
6.Summary
什么是青蛙胃口?
青蛙的胃分解解释了青蛙囊泡如何成为三个生殖细胞层的过程。外胚层,内胚层和中胚层。青蛙胚胎含有一个称为胚泡的腔。在植物极,它包含蛋黄,里面充满了大细胞。在动物极中,它具有较小的细胞。然后发生三个细胞层的开发开始。在青蛙胃肠道的初始阶段,很少有称为瓶细胞的表面细胞进入胚胎的内部。这种运动导致产生背唇。
在外包过程中,外胚层扩张。Furthermore, a cavity called archenteron forms inside, hence, blastocoels becomes small. Endoderm surrounds the archenteron completely. This cavity connects to the outside through blastopore and then eventually become the anus. At the end of the gastrulation process, the fate of the three layers has determined. Blastula became gastrula. Ectoderm develops into the skin, sense organs and the nervous system while endoderm gives the digestive and respiratory tract and associated structures. Mesoderm gives skeleton, muscles, circulatory system, excretory system and most of the reproductive systems.
什么是鸡胃口?
雏鸡的胃肠道是通过确定三个细菌层的命运,将雏鸡胚芽转化为鸡胃。鸡的胚细胞包含32个细胞。然后通过细胞分化转化为32个细胞的胚泡细胞。蛋黄囊的外层开始向外部形成新的单元格。在一定时间进行此过程之后,顶部开始形成另一个新层。蛋黄囊压缩并开始耗尽。当这些事件发生时,会出现一个称为胚泡的孔。
Cell invagination occurs thought this blastopore. The inner layer formed is the endoderm while the second layer is the ectoderm. Mesoderm develops in the anti clock direction as a sheet. All these three layers develop around the yolk sac. In the end, a small yolk sac remains in the gastrula. The fate of the three layers is decided at this stage. Ectoderm gives nervous system, eyes, feathers, etc. while endoderm forms digestive system. Mesoderm develops into a skeleton, circulatory system, muscles, excretory system, reproductive system, etc.
青蛙和鸡胃胃的相似之处是什么?
- 两栖动物和鸟类以非常相似的方式完成神经化。
- 在青蛙和小鸡中,这三层的命运是相同的。
What is the Difference Between Frog and Chick Gastrulation?
胃肠道是胚胎发育的阶段。在此阶段,单层囊泡变成多层胃。关于青蛙和小鸡,青蛙和鸡胃的主要区别在于,青蛙的胃裂开始于Epiboly,并导致空心的球胃胃拉,而鸡胃胃则通过胚泡开始,并导致带有平坦细胞床单的胃肠道。
这below infographic presents the difference between frog and chick gastrulation in tabular form.
摘要 - 青蛙vs鸡胃
胃肠液是生物早期胚胎发育的一个过程,在此过程中,单层囊泡将其转化为一种称为胃肠道的多层结构。胃结构后是器官发生。在胃结构期间,细胞的命运决定,生殖层也会发展。从青蛙和雏鸡胃结构之间的差异,青蛙和雏鸡的胃结构因上述几个因素而异。而且,青蛙和鸡胃的关键区别在于,青蛙的胃结构会导致空心的胃胃,而雏鸡的胃胃则导致胃胃late裂。但是,在两个生物体中,这三个细菌层的命运都是相同的。
参考:
1。“Gastrulation.” Wikipedia, Wikimedia Foundation, 9 Aug. 2018.在这里可用
2.编辑。“青蛙胚胎,雏鸡胚胎和海胆中的胃结构。”生物学词典,生物学词典,2018年3月27日。在这里可用
图片提供:
1.“ 14740956736”通过互联网存档书籍图像(公共领域)通过Flickr
2。”14768762243″ by Internet Archive Book Images (Public Domain) viaFlickr
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