blastula
spherical, hollow mass of cells resulting from the division of the egg.
Source: Noland, George B. 1983. General Biology, 11th Edition. St. Louis, MO. C. V. Mosby ...
Blastula
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Blastula
The blastula is an early stage of embryonic development in animals. It is produced by cleavage of a fertilized ovum and consisting of a spherical layer of cells surrounding a fluid-filled cavity.
Blastula
(plural: blastulae) [Gr. blastos - germ, bud, shoot]. The multicellular embryo formed as a result of cleavage. In higher animals it contains a fluid-filled cavity called the blastocoele.
permanent "blastula" of ciliated epidermal cells formed by experimental isolation of animal pole cells of the sea urchin embryo.
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z ...
blastula A ball of cells surrounding a fluid-filled cavity (the blastocoel) that is produced by the repeated cleavage of a zygote. PICTURE ...
blastula
(blas-tyoo-la) [Gk. blastos, sprout]
The hollow ball of cells marking the end stage of cleavage during early embryonic development.
blood ...
blastula - a cleavage stage embryo, typically a hollow ball of cells surrounding a cavity called the blastocoel; this term is used for (among others) echinoderm and amphibian embryos.
blastula
The hollow ball of cells marking the end stage of cleavage during early embryonic development.
blood vascular system
the mechanism by which blood is moved through the body. This includes the arteries, veins, capillaries, and heart.
blastula An early stage in the development of an embryo; it consists of a sphere of cells enclosing a fluid-filled cavity (blastocoel).
bleaching The expulsion of zooxanthellae by reef corals in response to stress.
blending See polygenic inheritance.
Blastulation and gastrulation establish the main body axis. Organ formation occurs in the next stage of the development of the embryo. During organ formation, cell division is accomplished by migration and aggregation.
Blastula
What Sulston and his colleagues did with tracing the entire cell lineage would be exceedingly difficult for the vast majority of organisms. Most multicellular organisms have far more cells than C. elegans.
Below: Whitefish blastula X 400
Mitosis in Plants
Plants form a spindle apparatus as animals do but plants lack centrioles.
Bipolar cells of human retina Birds Birth control Birth, human Biston betularia Bivalent Bivalvia Blastema BlastocystThe blastula formed by placental mammals. The blastocyst is the embryonic stage that implants in the wall of the uterus.
After fertilization, when the egg is still in the oviduct, it begins to divide by mitosis to form a hollow fluid filled ball of cells called the blastula. This process is called cleavage.
Problem 9: Structure of the blastula
The sheet of cells in the blastula of a developing animal embryo is called the:
A.
blastocoel ...
 See also: Embryo, Cells, Cell, Organ, Animal
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