from the topologically-speaking-you-are-a-torus dept.
The mouth and anus are not connected in the development of the embryo as earlier thought, shows a Norwegian ground-breaking study.
Animals often form either the mouth or the anus from an opening that appears in the early embryo, which is called the blastopore.
For instance, starfish develop the anus from the blastopore, but earthworms form the mouth out of it. How this happens has not been clear until now.
"Our findings demonstrate that whether the blastopore forms the mouth or the anus is a consequence of how each embryo is organized during early development. It is not a predefined attribute of the species, as previously thought," says postdoctoral researcher Jose Maria Martin-Duran, at the Hejnol Group at Sars Centre at the Department of Biology, University of Bergen (UiB).
"One of the most important conclusions of our work is that there is no necessary association of the mouth and the anus with the embryonic blastopore," says Martin-Duran.
The developmental basis for the recurrent evolution of deuterostomy and protostomy (open, DOI: 10.1038/s41559-016-0005) (DX)
(Score: -1, Offtopic) by Anonymous Coward on Friday December 30 2016, @07:15AM
(Score: 2) by MostCynical on Friday December 30 2016, @07:22AM
which came first, talking out your arse, or talking sh!t?
"I guess once you start doubting, there's no end to it." -Batou, Ghost in the Shell: Stand Alone Complex
(Score: 0) by Anonymous Coward on Friday December 30 2016, @08:34AM
Blow it out your blast-o-pore.
(Score: 2) by Gaaark on Friday December 30 2016, @06:27PM
"Shut yo' mouth!"
"But i'm just talkin' about Uranus!"
"Then we can dig it"
--- Please remind me if I haven't been civil to you: I'm channeling MDC. ---Gaaark 2.0 ---
(Score: 0) by Anonymous Coward on Friday December 30 2016, @10:34PM
"Close it yourself, shitty."
(Score: 2) by Rosco P. Coltrane on Friday December 30 2016, @08:37AM
I think you just put your foot in your anus there...
(Score: 5, Funny) by stretch611 on Friday December 30 2016, @10:26AM
which came first, talking out your arse, or talking sh!t?
Both these things occurred at the same time with the evolution of the sub-humanoid species known as the "politician."
Now with 5 covid vaccine shots/boosters altering my DNA :P
(Score: 2) by Scruffy Beard 2 on Friday December 30 2016, @02:19PM
I think the actual answer is that it used to be both.
You ingest, digest, regurgitate.
(Score: 2) by butthurt on Saturday December 31 2016, @12:38AM
Starfish can feed without even ingesting: they evert their stomachs.
(Score: 2) by inertnet on Friday December 30 2016, @12:06PM
I'm glad that we can tell them apart now.
(Score: 4, Funny) by art guerrilla on Friday December 30 2016, @02:08PM
step two is to tell it apart from a hole in the ground...
(Score: 0) by Anonymous Coward on Friday December 30 2016, @03:16PM
Except for politicians, who talk out of their sphincter.
(Score: 2) by aristarchus on Saturday December 31 2016, @12:16AM
ποιμένες ἄγραυλοι, κάκ᾽ ἐλέγχεα, γαστέρες οἶον,
ἴδμεν ψεύδεα πολλὰ λέγειν ἐτύμοισιν ὁμοῖα,
ἴδμεν δ᾽, εὖτ᾽ ἐθέλωμεν, ἀληθέα γηρύσασθαι.
Hesiod, Theogony [tufts.edu]
(Score: 2) by aristarchus on Saturday December 31 2016, @05:34AM
That Feeling When: you get modded "offtopic" by someone who cannot read Greek. Oh, Mores! Oh, Tempura! Oh, Literatti!
(Score: 2) by Azuma Hazuki on Friday December 30 2016, @05:16PM
They have only one hole. So even their favorite foods taste like shit.
I am "that girl" your mother warned you about...
(Score: 4, Funny) by iWantToKeepAnon on Friday December 30 2016, @05:47PM
He said "blastopore".
Sorry, yes I am juvenile.
"Happy families are all alike; every unhappy family is unhappy in its own way." -- Anna Karenina by Leo Tolstoy