#blastula

[intelligentchristianlady]

Pop quiz: What is it?

The blue-green cone is a 34-gauge needle, seen under an electron microscope.

Funny thing about needle gauges: the larger the number, the smaller (= thinner) the needle. The smallest needle recommended to give an infant an intramuscular injection is 25-gauge (x). The smallest (= thinnest) lancet available for a diabetes finger-stick is 33-gauge. So this is a very, very fine needle, finer than a human hair.

The red part? It's 16 human cells, forming what I think is called a blastula.

But in some states, it's a recognized human person with more rights than you have.

Unless, of course, it's actually cat cells or cow cells...

[prenic-a: please feel free to jump in if I got any of this this wrong!]

[xrayvsncom]

Financial Zygote: We All Have To Start Somewhere

Financial Zygote: We All Have To Start Somewhere

              For my non-medical readers, in embryology the term zygote refers to the union of 2 gametes (an ovum from the female and a sperm from the male). The fertilized egg, or zygote, is essentially the initial step in forming a complete human being. It is remarkable that an organism that is composed of trillions of cells has its origin traced back to just these 2 cells that were able to…

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[tonytochim]

The Role of the Cytoplasm in Genetics and DNA Manipulation

For a better understanding of DNA manipulation, Acetabularia provides us with a pleasingly simple case of development: a single cell, one nucleus and a comparatively uncomplicated structure. But how do we explain the development of a complex multicellular organism? In particular how do we explain the fact that the various cells of the embryo differentiate into distinct types of cell despite the fact that they are all derivatives of one original cell, the fertilized egg? What makes this even more remarkable is the fact that the embryo is effectively sealed off from the outside world. Only respiratory gases pass across the membrane surrounding it and we are forced to conclude that everything required for the formation of a differentiated multicellular embryo is present in the fertilized egg right from the start.                   THE ROLE OF THE CYTOPLASM In genetic engineering or any other form of DNA manipulation there is considerable evidence that, however important the nucleus may be, the cytoplasm also plays a significant part in the process of differentiation. One has only to look at a mature egg to appreciate that the cytoplasm shows considerable differentiation even before fertilization occurs. Mitochondria, RNA, and pigment granules are found towards the metabolically active animal pole, whereas the heavier yolk granules are concentrated towards the more inert vegetal pole. Read the full article

[ipgill]

Biol lab first year

Microscopic view of whitefish blastula

[scottketcham]

#544  Minding the Blastula

2016, 44 X 30″, oil on denril

[ladykaltag]

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Fun little sea urchin blastulas spinning around in the microscope #science #biology #microscopy #developmentalbiology #seaurchin #blastula

[fruitsoftheweb]

“MecaGen simulation of Sea Urchin blastula”

[perelka-l]