Jul 12, 2019
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Video of Volvox embryo turning itself inside out
Video of Volvox embryo turning itself inside out
Researchers has managed to film a 3D video of a they call as the “most important time in your life”. The live embryo was clearly seen shape-shifting from a sphere to a mushroom and back to a sphere again. The behavior or the organism will help the team understand an important mechanical process in the development of early animals.
Researchers captured the first 3D images of a green alga known as
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Neuroporus anterior
Synonyme: Neuroporus cranialis, Neuroporus rostralis Englisch: anterior neuropore, cranial neuropore, rostral neuropore
1 Definition
Der Neuroporus anterior ist eine vorübergehende Öffnung des embryonalen Neuralrohrs, die sich gegen Ende der 4. Entwicklungswoche, etwa am 24.-25. Embryonaltag (zwei Tage vor dem Schluss des Neuroporus posterior), schließt.
2 Klinik
Die Höhe des Neuroporus anterior…
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Compaction
Synonym: Kompaktierung Englisch: compaction 1 Definition
Als Compaction bzw. Kompaktierung bezeichnet man im Rahmen der Embryonalentwicklung das Ausbilden von Zellkontakten im zuvor losen Zellverband der Morula.
2 Aufbau
Die äußeren Zellen bilden durch Tight junctions und Gap junctions einen dichten Ring, die inneren formen den späteren Embryo. Durch die Differenzierung in den innen gelegenen…
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writing lab reports more like your word processor getting very angry because it doesn't know that anything you're typing is a real word
so many angry red lines
Neurulation in vertebrates results in the formation of the neural tube, which gives rise to both the spinal cord and the brain. Neural crest cells are also created during neurulation. Neural crest cells migrate away from the neural tube and give rise to a variety of cell types, including pigment cells and neurons.
Neurulation begins with the formation of a neural plate, a thickening of the ectoderm caused when cuboidal epithelial cells become columnar. Changes in cell shape and cell adhesion cause the edges of the plate fold and rise, meeting in the midline to form a tube. The cells at the tips of the neural folds come to lie between the neural tube and the overlying epidermis. These cells become the neural crest cells. Both epidermis andneural plate are capable of giving rise to neural crest cells.
What regulates the proper location and formation of the neural tube? The notochord is necessary in order to induce neural plate formation.
keep misreading 'Primitive Streak' as 'Primitive Steak'.
revision's going so well today :/
Primary neurulation: neural tube formation in the chick embryo. (A, 1) Cells of the neural plate can be distinguished as elongated cells in the dorsal region of the ectoderm. Folding begins as the medial neural hinge point (MHP) cells anchor to notochord and change their shape, while the presumptive epidermal cells move towards the center. (B, 2) The neural folds are elevated as presumptive epidermis continues to move toward the dorsal midline. (C, 3) Convergence of the neural folds occurs as the dorsolateral hinge point (DLHP) cells become wedge-shaped and epidermal cells push toward the center. (D, 4) The neural folds are brought into contact with one another, and the neural crest cells link the neural tube with the epidermis. The neural crest cells then disperse, leaving the neural tube separate from the epidermis. (Photographs courtesy of K. Tosney and G. Schoenwolf; drawings after Smith and Schoenwolf 1997.)