Lexic.us

Definition of Blastopore

1. Noun. The opening into the archenteron.

Definition of Blastopore

1. n. The pore or opening leading into the cavity of invagination, or archenteron.

Definition of Blastopore

1. Noun. (embryology) The opening into the archenteron. ¹

¹ Source: wiktionary.com

Definition of Blastopore

1. [n -S]

Medical Definition of Blastopore

1. During gastrulation cells on the surface of the embryo move into the interior to form the mesoderm and endoderm. The opening formed by this invagination of cells is the blastopore. It is an opening from the archenteron, the primitive gut, to the exterior. In some animals this opening becomes the anus, whilst in others it closes up and the anus opens at the same spot or nearby. In some animals, for example chick, invagination occurs without a true blastopore and the site at which the cells move in (primitive streak) may be termed a virtual blastopore. This entry appears with permission from the Dictionary of Cell and Molecular Biology (11 Mar 2008)

Lexicographical Neighbors of Blastopore

Literary usage of Blastopore

Below you will find example usage of this term as found in modern and/or classical literature:

1. Journal of Morphology by Wistar Institute of Anatomy and Biology (1897)
"This unequal growth does not cause the blastopore to close more rapidly at its posterior side, but it does change the position of the apical pole, ..."

2. The Development of the Frog's Egg: An Introduction to Experimental Embryology by Thomas Hunt Morgan (1897)
"The posterior edge of the blastopore also grows forward for a short distance, and as a result a pocket-like continuation of the archenteron is formed (Fig. ..."

3. The Encyclopaedia Britannica: “a” Dictionary of Arts, Sciences, Literature edited by Hugh Chisholm (1911)
"The enteran arises as a space in the endoderm, and an opacity—the primitive streak—appears at the hind end of the blastopore (fig. n. B). ..."

4. Bryn Mawr College Monographs by Bryn Mawr College (1902)
"The lateral and ventral lips of the blastopore had formed in the normal manner and the extra-ovates in every case were some distance from the blastopore rim ..."

5. The Encyclopedia Americana: A Library of Universal Knowledge (1918)
"It is typically a double-walled sac surrounding the archenteron or primitive digestive cavity, which opens at one pole to the exterior by the blastopore or ..."

6. Text-book of the Embryology of Invertebrates by Eúgen Korschelt, Karl Heider, Edward Laurens Mark, William McMichael Woodworth, Matilda Bernard, Martin Fountain Woodward (1900)
"The anterior end of the blastopore in the forms just named, also, becomes the mouth, so that the relations of the blastopore to the mouth and to the anus in ..."

7. The Encyclopaedia Britannica: A Dictionary of Arts, Sciences, and General by Thomas Spencer Baynes (1888)
"ISO, 151), no part of the blastopore persista either aa month or as anus, ... The orifice of invagination (blastopore) narrows, and we now have a ..."

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