In a multicellular organism, an organ is a collection of tissues joined in a structural unit to serve a common function.
Following that, the oldest organ that forms, is actually the trophoblast on day 4-5, which will give rise to all non-embryonic parts.
But let's ignore that and only look at organs that one generally has with them for life, and only once the organ starts to actually form together as separate from pre-organ and 'cognate organ' cells. In other words, once the organs form as standalones.
Correct me if I'm wrong, but that would then make the heart, as it forms by Carnegie stage 9, 25 days after fertilisation. This is before the skin proper is developed.
13 Comments
mEEGal@lemmy.world · 33 pts · 205d
AI slop
LadyAutumn@lemmy.blahaj.zone · -4 pts · 205d
What đ
mEEGal@lemmy.world · 15 pts · 205d
The text is a meme, just search for a snippet on the web; the image is clearly AI-generated
Hence, AI slop
PointyFluff@lemmy.ml · 10 pts · 205d
First encounter with mirror, OP?
lemmie689@lemmy.sdf.org · 5 pts · 205d
Some people are such big blastopores.
stelelor@lemmy.ca · 4 pts · 205d
That looks more like spina bifida.
unemployedclaquer@sopuli.xyz · 3 pts · 205d
What's it with the goats. Can't find a goats emoji.
morto@piefed.social · 3 pts · 205d
Does it also make the anus your oldest organ?
pulsewidth@lemmy.world · 18 pts · 205d
Skin, probably. Everyone forgets that your skin is an organ.
birdwing@lemmy.blahaj.zone · 2 pts · 203d
According to Wikipedia:
Following that, the oldest organ that forms, is actually the trophoblast on day 4-5, which will give rise to all non-embryonic parts.
But let's ignore that and only look at organs that one generally has with them for life, and only once the organ starts to actually form together as separate from pre-organ and 'cognate organ' cells. In other words, once the organs form as standalones.
Correct me if I'm wrong, but that would then make the heart, as it forms by Carnegie stage 9, 25 days after fertilisation. This is before the skin proper is developed.
certified_expert@lemmy.world · 1 pts · 205d
Brother in christ, that anus is not anusing
rhelawyn@lemmy.world · 1 pts · 205d
Humans are doughnut shaped
brown567@sh.itjust.works · 3 pts · 205d
Nah, we got at least a couple more holes than that