The blastula (from Greek βλαστός (blastos), meaning "sprout") is a hollow sphere of cells formed during an early stage of embryonic development in animals . The blastula is created when the zygote undergoes the cell division process known as cleavage. The blastula is preceded by the morula and is followed by the gastrula in the developmental sequence.[citation needed]
A common feature of a vertebrate blastula is that it consists of a layer of blastomeres, known as the blastoderm, which surrounds an interior central cavity known as the blastocoel. In mammals, blastulation leads to the formation of the blastocyst, which must not be confused with the blastula. The blastocyst contains an embryoblast, which is homologous to the blastula. However, it also includes the trophoblast, which goes on to form the extraembryonic tissues.[citation needed]
The death toll from Tuesday’s Taliban attack in Kabul more than doubled overnight from 28 to 64 and most of the casualties were civilians – including women and children, The Associated Press quoting AfghanInterior Ministry officials said Wednesday.Gen.Abdul Rahman Rahimi, Kabul’s police chief, told a news conference Wednesday two investigative teams have been appointed to investigate the attack in Kabul ...Secret Service....
Right-wing extremist Anders Behring Breivik’s human rights have been violated during his imprisonment for terrorism and mass murder, a Norwegian court has ruled ... Agencies. . . ....
Houston (CNN)While some parts of Houston are starting to recover from paralyzing flooding, some residents believe the worst is yet to come. The problem. Cypress Creek in northwest Houston keeps rising and still hasn't crested, officials say, and forecasters expect more rain Wednesday. In the town of Klein, John Martin stuffed his suitcase and bolted for a friend's house ... Read More ...That's more rain than Salt Lake City gets in a year ... 9 ... ....
For more than 3 billion years since single-cell organisms first appeared on the planet, life has evolved in one direction only. When a plant or animal becomes extinct, there is no coming back. Or so we thought ... Advertisement ... ''I thought it was a very special creature ... Genetic tests revealed the embryos, known as blastulae, contained the DNA of the extinct frog so the team are confident their extinct genome is functioning ... ....
Why are our genitals positioned between our legs?. originally appeared on Quora. The best answer to any question. Ask a question, get a great answer. Learn from experts and access insider knowledge. You can follow Quora on Twitter, Facebook, and Google+. Answer by Joshua Engel... The process of forming the digestive tract through the center of the blastula is one of the first things that happens to a developing embryo ... ....
In a study using embryos from the frog Xenopus, a powerful model system used in studies of development, LaBonne and her team found that neural crest cells and the early pluripotent cells present in blastula embryos have surprising similarities, including shared expression of a key set of genes which work together to endow the cells with their unique properties....
(Source. University of Wyoming). Predrag Jevtic, a UW doctoral student in the Molecular and CellularLife Sciences program, is lead writer of a paper that appears in Current Biology today. (UW Photo) ... Such scaling may have future implications for controlling the rate of cancerous growth in human cells ... The MBT is a transition during the blastula stage of embryonic development in which zygotic gene transcription is activated ... (noodl....
Tommy Emmanuel is a musician for music lovers -- a true master of his craft and one of the finest guitar players in the world. The Australian guitarist comes to the Crouse Hinds Theater Tuesday night at 7.30 p.m. Emmanuel was a prodigy from a young age -- a student of Chet Atkins' style of guitar and eventual champion of the folksy "fingerstyle" method of playing ...The Boss's birthday is Sept ... CountBlastula -- Dinosaur Bar-B-Que, 9 p.m ... ....
By Stephanie PappasPublished April 15, 2014. Facebook0 Twitter0 Gplus0. A Cambrian embryo fossil exposed by acid etching on rock. The polygonal pattern suggests that the embryo was in the multicellular blastula stage of development.Broce et al ... ADVERTISEMENT. ADVERTISEMENT ... [See Images of a Giant Cambrian Creature] ... The researchers believe that these specimens are blastulas, which are an early, multicellular stage of embryonic development ... ....
A Cambrian embryo fossil exposed by acid etching on rock. The polygonal pattern suggests that the embryo was in the multicellular blastula stage of development. Tiny, spherical fossils found in southern China appear to be the embryos of a previously unknown animal ... [See Images of a Giant Cambrian Creature] ... The researchers believe that these specimens are blastulas, which are an early, multicellular stage of embryonic development ... email ... ....
View gallery. Soft-tissue fossils from the Ediacaran period, the last period before the Cambrian. These fossils co …. Tiny, spherical fossils found in southern China appear to be the embryos of a previously unknown animal ... tiny spheres, including some with polygonal patterns on their surfaces ... The researchers believe that these specimens are blastulas, which are an early, multicellular stage of embryonic development....
Roughly six months ago, a father-son duo in Pulaski renovated a relic of the small village's formative days. In November, they reopened the historic Kallet Theater -- which had long served as an eyesore in the rustic village -- as a multi-functional, state-of-the-art entertainment facility. The inaugural act. Marshall Tucker Band. The revived theater represents a rarity in Upstate New York...CountBlastula -- Al's Wine & Whiskey, 9 p.m ... ....
This Sunday marks the 50th anniversary of the Beatles' first appearance on The Ed Sullivan Show. And nationwide, people are looking to celebrate, reflect and remember. While the Grammys will host a quasi-reunion of Beatles on CBS (Paul and Ringo), Syracuse will host its own reunion ... Earlier in the week, the Westcott Theater brings in two powerhouse groups ... CountBlastula -- Dinosaur Bar-B-Que, 8 p.m. Mike Place -- Coleman's, 9 p.m ... ....