How the Body Works : From Embryo to Fetus-Part One

From Embryo to Fetus-Part One

Twenty days after fertilization the embryo is a three-layered disk of ectoderm, mesoderm and endoderm cells. Eight days later the yolk sac has shrunk, the amnion has enlarged and the embryo has recognizable features. The embryo at three weeks, has a primitive heart and rudimentary brain tissue. One week later the heart is pumping blood around the body and into the placenta. The embryo at five weeks has twenty-eight pairs of tissue blocks, which later form bones and muscles. Limb buds and rudimentary eyes are visible and the tail is receding. One week later the hands have rudimentary fingers, the eyes have lenses and the liver and heart are visible. At seven weeks the head grows rapidly, external ears are visible, the eyes are open and the tail has disappeared. At eight weeks the embryo is now called the fetus. It has most of its tissues and organs and well-developed hands and feet.

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Howto & Style

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• From
• Embryo
• to
• Fetus-Part
• One

[saidpls]

Embryology in the Quran "O Mankind! If you have a doubt about the Recreation (consider) that We created you out of dust, then out of sperm, then out of a leech-like, then out of a chewed-like lump of flesh, formed or unformed, in order that We may manifest (our power) to you; and We cause whom We will to rest in the wombs for an appointed term" QURAN (22:5)

[felipemonkey]

dude, this is creepy....

[zilexxx]

LoL Quran is wrong because there is no clothing of the flesh with bones neither it says muscles anywhere ,everything is created at the same time from the same substance,and quran clearly show sequence which does not exist in the embryology but very much has to do with plagiarizing Aristotle

[blarfandar]

Thank you it was very helful vedio. and by listening to curan made me worship and thank God

[Giro635]

great help with assesment

[tzawa00]

very helpful for my exams... 10x dudes!

[tgdayana]

omg,they do look like aliens tho =/

[doublestar420]

how amazing! I cannot believe how fast the baby is growing!!!

[neostryke]

Excellent, informative video - VERY USEFUL! Thanks

[Bmeson]

i didnt see gills :'(