Blastocyst

The blastocyst is a structure formed in the early development of vertebrates. It is preceded by the morula. It possesses an inner cell mass (ICM), or embryoblast, which subsequently forms the embryo, and an outer layer of cells, or trophoblast, which later forms the placenta. The trophoblast surrounds the inner cell mass and a fluid-filled blastocyst cavity known as the blastocoele or the blastocystic cavity. The human blastocyst comprises 70-100 cells.

Blastocyst formation begins at day 5 after fertilization in humans, when the blastocoele opens up in the morula, a process known as hatching.

Read more about BlastocystParts of The Blastocyst, Formation of The Blastocyst

Other articles related to "blastocyst":

Bilaminar Blastocyst - Formation of The Blastocyst
... form a fluid-filled central cavity called the blastocyst cavity (blastocoele) ... Therefore, the blastocyst cavity serves as a nutrient center and the fluid is able to reach and feed cells so that they can continue growing and dividing ... The embryo is called a blastocyst at about the 6th day of development once it has reached nearly 100 cells ...
Bilaminar Blastocyst - Becoming Bilaminar
... The zygote first transformed into a morula through cleavage and then more divisions lead to a blastocyst that consisted of just a trophoblast, and a embryoblast ... At the embryonic pole of the blastocyst, the amniotic cavity finds a home between the epiblast and the hypoblast ... the amnion, is what contributes to the bilaminar embryonic disc (bilaminar blastoderm/blastocyst), which sits between the amniotic cavity and the blastocyst cavity ...
Bilaminar Blastocyst
... Bilaminar blastocyst or Bilaminar disc refers to the epiblast and the hypoblast, evolved from the embryoblast ... as the bilaminar embryonic disc as well as the bilaminar blastocyst or bilaminar blastoderm ... This bilaminar blastocyst also defines the primitive dorsal ventral axis ...
Prenatal Development - Embryonic Period
... This stage is called a blastocyst ... The blastocyst reaches the uterus at roughly the fifth day after fertilization ... a term that refers to the emergence of the blastocyst from the zona pellucida, when incubated in vitro ...