Funny fact! Human is deuterostome which means…!

deuterostome

The defining characteristic of the deuterostome is the fact that the blastopore (the opening at the bottom of the forming gastrula) becomes the anus, whereas in protostomes the blastopore becomes the mouth. The deuterostome mouth develops at the opposite end of the embryo from the blastopore and a digestive tract develops in the middle connecting the two.

The name deuterostome means “mouth second”, and refers to one important developmental feature unique to this group. To understand this feature, a little animal embryology is necessary. In the earliest stages of embryo development, when there are only a few cells and the embryo resembles a tiny globe of cells, a small pucker develops on one side of the embryo. This grows into a pocket, and allows some cells to migrate inside to form an additional layer of cells within the outer layer. At this stage, the embryo is known as a gastrula. In the Protostomia, which is the other major group of the Bilateria, the mouth develops from the edge of this pocket, where the inner and outer layer of cells meet; the anal opening develops later. In the Deuterostomia, the reverse is true; the pocket edge develops into the anus, and the mouth is formed later. Hence the byline at the top of this page: “Your mouth comes second.”

Read more here:

http://www.ucmp.berkeley.edu/phyla/deuterostomia.html

http://en.wikipedia.org/wiki/Deuterostome

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2 Responses to "Funny fact! Human is deuterostome which means…!"

  1. I hope you never stop! This is one of the best blogs Ive ever read. Youve got some mad skill here, man. I just hope that you dont lose your style because youre definitely one of the coolest bloggers out there. Please keep it up because the internet needs someone like you spreading the word.

  2. Fantastic read, I just passed this onto a colleague who was doing a little investigation on that. And he really bought me lunch because I discovered it for him smile So let me rephrase that: Thanks for lunch!

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