By Marta Koblańska, May 30, 21:50. Zdjęcie: zapłodnienie, licencja TBIT, Pixabay
Im cięższa jest wada genetyczna zarodka i późniejszego płodu, tym szybciej jest on eliminowany z organizmu kobiety. Lżejsze wady z reguły pozwalają na donoszenie ciąży, choć nie oznacza to, że dziecko przeżyje po urodzeniu – mówią eksperci z zakresu ginekologii i położnictwa oraz neonatologii.
Organizm ludzki powstaje stopniowo, po połączeniu się komórek płciowych męskiej i żeńskiej oraz skutecznym przemieszczeniu się powstałej zygoty i zagnieżdżeniu się zarodka w jamie macicy kobiety. To ten narząd wyłącznie przypisany kobietom tworzy warunki do rozwoju nowego człowieka. Nieodzownym elementem tego procesu jest podział komórkowy zygoty i późniejszego zarodka. Wraz z następowaniem kolejnych etapów ciąży poszczególne komórki różnicują się budując wyspecjalizowane tkanki, narządy i wreszcie cały organizm zdolny do życia w środowisku zewnętrznym. Tak w skrócie wygląda życie płodowe, ale po drodze może zdarzyć się wiele zakłóceń.
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Rzeczywiste i iluzoryczne kontrowersje wokół ciąży
Zdjęcie: Zapłodnienie. Licencja TBIT, Pixabay Im cięższa jest wada genetyczna zarodka i późniejszego płodu, tym szybciej jest on eliminowany z organizmu kobiety. Lżejsze wady z reguły pozwalają na donoszenie ciąży, choć nie oznacza to, że dziecko przeżyje po urodzeniu – mówią eksperci z zakresu ginekologii i położnictwa oraz neonatologii. Organizm ludzki powstaje stopniowo, po połączeniu…
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Energy security in the Baltic may hinge on Poland’s plans for N power
Photo: Geopolitical map of Europe, author: Hidalgo, Pixabay Russia’s unprovoked invasion of Ukraine has accelerated the efforts of the Baltic states to extricate themselves from the Moscow-controlled BRELL power grid system. Despite facing synchronization issues and energy quota challenges, these nations have abandoned their ties with Russia. In this context, Poland could play a crucial…
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Why are genes less similar better for studying diseases?
Photo: Baboon, Clker-Free-Vector-Images, Pixabay Baboons show greater resilience to diseases despite their diverse genome, whereas humans, with a singular set of chromosomes, exhibit increased susceptibility – according to a new study published in ,,Cell Genomics”. Genetic variations differ in humans as a whole body or within the body in certain tissues. Genetic variation, simplifying, is the number of chromosomal…
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How do we cope with propaganda? Is it clear for most of us or not?
Photo: Radio waves, Credit: Clker-Free-Vector-Images, Pixabay Does repeating a lie a hundred times make it true? Unfortunately, more often than we would like, the answer is yes. This phenomenon is a key aspect of how propaganda operates. Propaganda has existed since the emergence of different organized human societies and countries. Innovations in communication tools and…
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What influences cognition? The exchange in purine bases and amino acids in the brain.
Photo: Adenine structure, one of the purine bases, specifically connects to thymine via hydrogen bonding in DNA and uracyl in RNA, as discovered by James Watson and Francis Crick in the 50s. Credit:kropekk_pl Of the about 20,000 metabolites discovered so far in human blood serum, over 1,300 and 140 lipids have been observed to profile the brain’s uptake and…
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When and why might the genetic code change? Groundbreaking research addresses these questions.
Photo: Evolved macroscopic “snowflake” yeast from the MuLTEE experiment. The large size of the nuclei (yellow) and cells (cyan) are results of whole-genome duplication and aneuploidy. Credit: Georgia Institute of Technology The specific chromosomal configurations and changes in their numbers may persist or disappear depending on population size and environmental conditions. Can we live outside…