14.1 Embryonic Development – Anatomy & Physiology
Learning Objectives 1. Describe the growth and differentiation of the neural tube 2. Relate the different stages of development to the adult structures of the central nervous system 3. Explain the expansion of the ventricular system of the adult brain from the central canal of the neural tube 4. Describe the connections of … 展开
To begin, a sperm cell and an egg cell fuse to become a fertilized egg. The fertilized egg cell, or zygote, starts dividing to generate the cells that make up an entire … 展开
As the anterior end of the neural tube starts to develop into the brain, it undergoes a couple of enlargements; the result is the production of sac-like vesicles. Similar to a … 展开
The brain continues to develop, and the vesicles differentiate further (see Figure 14.1.2 b). The three primary vesicles become five secondary vesicles. The … 展开
Embryology - TeachMeAnatomy
Learn about the stages of embryonic development from fertilisation to implantation, gastrulation and organogenesis. Explore the formation and function of the skin, nerves, heart, face, head, neck, reproductive and urinary systems.
Human embryonic development - Wikipedia
The primitive streak, a linear collection of cells formed by the migrating epiblast, appears, and this marks the beginning of gastrulation, which takes place around the seventeenth day (week 3) after fertilization. The process of gastrulation reorganises the two-layer embryo into a three-layer embryo, and also gives the embryo its specific head-to-tail, and front-to-back orientation, by way of the pri…
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Embryology - Wikipedia
Evolutionary embryology is the expansion of comparative embryology by the ideas of Charles Darwin. Similarly to Karl Ernst von Baer's principles that explained why many species often appear similar to one another in early developmental stages, Darwin argued that the relationship between groups can be determined based upon common embryonic and larval structures.
1. The general features appear earlier in development than do the specialized features.Wikipedia · CC-BY-SA 许可下的文字- 预计阅读时间：9 分钟
Embryonic Development - Embryology
3 天之前 · Online resources include: individual images of all Carnegie stages, scanning electron micrographs of the earlier stages, cross-sections showing internal structures at mid- and late-embryonic, 3D reconstructions of internal …
28.2 Embryonic Development – Anatomy & Physiology
Learn about the stages of embryonic development from fertilization to implantation, and the formation of the embryonic membranes, placenta, and organ systems. Explore the time-lapse movie of a conceptus and the …
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Embryological Development | Biology for Majors II - Lumen Learning
The ectoderm develops into the outer epithelial covering of the body surface, the central nervous system, and a few other structures. The mesoderm is the third germ layer; it forms between …
Mechanisms of human embryo development: from cell fate to …
In response to ECM proteins secreted by the extra-embryonic tissues (Li et al., 2003), epiblast cells become polarised and form a rosette-like structure that undergoes lumenogenesis to …
Comparative Embryology - Developmental Biology
These diagrams “map” the larval or adult structure onto the region of the embryo from which it arose. Fate maps are the bases for experimental embryology, since they provide researchers with information on which portions of the embryo …
Embryonic Structures - an overview | ScienceDirect Topics
Bones are derived from three embryonic structures: the neural crest, which through the branchial arches gives rise to the craniofacial bones; the sclerotomes, which give rise to the axial …
