That stage in the development of the ovum in which the outer cells of the morula become more defined and form the blastoderm.
early stage of animal development in which a single layer of cells surrounds a fluid filled cavity, forming a hollow ball
(Greek, blastos = sprout = little sprout) A stage of an animal embryo that consists of a fluid filled sphere of cells on the surface. ( More? Week 2 Notes)
Early stage of an animal embryo, usually consisting of a hollow ball of cells, before gastrulation begins.
The name given to an embryo in the very early stages of development. Also called blastoderm.
hollow ball of cells formed from developing egg in early stage of embryo
hollow sphere of cells produced during the development of an embryo by repeated cleavage of a fertilized egg
an early stage in the development of a zygote
(blass´ chu luh) [Gr. blastos: sprout] • An early stage in animal embryology; in many species, a hollow sphere of cells surrounding a central cavity, the blastocoel. (Contrast with blastodisc.)
Ball of cells formed following cleavage of Zygote.
( blas-tyoo-la) [Gk. blastos, sprout] The hollow ball of cells marking the end stage of cleavage during early embryonic development.
Term (often used in lower vertebrates) to describe an early stage in the development of an embryo consisting of a hollow sphere of cells enclosing a fluid-filled cavity called the blastocoel. The term blastula sometimes is used interchangeably with blastocyst.
a microscopic collection of cells, without varigation or differentiation
An embryo stage, usually with a hollow, fluid-filled cavity surrounded by a single layer of cells.
An early stage of embryonic development (roughly 100-200 cells) at which the cells of the morula are rearranged to form a hollow sphere; at this stage of embryonic development in humans and other mammals, the embryo is generally called a blastocyst.
Stage of embryonic development of animals near the end of cleavage but before gastrulation. In animals where cleavage (cell division) involves the whole egg, the blastula usually consists of a hollow ball of cells.
an embryo at the stage of development in which it consists of usually one layer of cells around a central cavity, forming a hollow sphere [WNW
A ball of cells surrounding a fluid-filled cavity (the blastocoel) that is produced by the repeated cleavage of a zygote. PICTURE
In animals, an early embryo form that follows the morula stage; typically, a single-layered sheet (blastoderm) or ball of cells (blastocyst).
The embryonic stage of development following the morula during the early stages of pregnancy. Spherical in shape, it consists of a mass of two layers of cells surrounding a fluid filled cavity, the blastocoele. The outer layer of cells, the trophoblast will develop to form the placenta, while the inner layer, the embryoblast, will become the fetus. The blastula usually implants itself in the wall of the uterus on the eighth day following fertilization. It is also known as the blastocyst.
(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.
An early developmental stage of lower vertebrate embryos, in which the embryo consists of a single layer of cells surrounding the central yolk.
blastula] a hollow ball of cells, one layer thick, formed by cleavage in the early development of the embryo (follows the morula stage)
An early developmental stage of vertebrate embryos formed by cleavage of the fertilized egg, in which the embryo consists of a single layer of cells surrounding a cavity (the blastocoel).
bisc333 early stage of an embryo produced by cleavage of an ovum; a liquid-filled sphere whose wall is composed of a single layer of cells; during this stage (about eight days after fertilization) implantation in the wall of the uterus occurs www.cogsci.princeton.edu/cgi-bin/webwn
An early embryonic form produced by cleavage of a fertilized ovum and usually consisting of a single layer of cells surrounding a fluid-filled spherical cavity.
The blastula is an early stage of embryonic development in animals. It is also called blastosphere. It is produced by cleavage of a fertilized ovum and consists of a spherical layer of around 128 cells surrounding a central fluid-filled cavity called the blastocoel.