quick question

[allstardentist]

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is blastocyst equivalent to blastula?

 

[dat_student]

is blastocyst equivalent to blastula?

The blastocyst is an early form of the blastula stage

 

[allstardentist]

The blastocyst is an early form of the blastula stage

so there are diff. forms in blastula? if there are, what are they?

 

[djeffreyt]

a blastocyst is a cell type. A blastula refers to all of the cells in the blastula stage of embryonic development

 

[student1985]

a blastocyst is a cell type. A blastula refers to all of the cells in the blastula stage of embryonic development

From my studying, a blastocyst is the name given for the "human" stage of the blastula. For instance, the equivalent stage in the frog is called the blastula and the equivalent stage in the chicken is called the blastoderm. However, all are similar in the structure except for some differences. Hope that helps.

 

[allstardentist]

From my studying, a blastocyst is the name given for the "human" stage of the blastula. For instance, the equivalent stage in the frog is called the blastula and the equivalent stage in the chicken is called the blastoderm. However, all are similar in the structure except for some differences. Hope that helps.

i found a similar def. like what you have said. Does that mean the other ones posted by other people are incorrect?

 

[dat_student]

i found a similar def. like what you have said. Does that mean the other ones posted by other people are incorrect?

http://scienceweek.com/2000/sw000121.htm

"
*morula/blastocyst stage: The "morula" is an early
embryonic *cleavage stage consisting of a solid mass of cells
(blastomeres). The next stage is the "blastula" stage, in which
the cells form a hollow sphere. The "blastocyst" is an early form
of the blastula stage, a mammalian egg in the later stages of
cleavage. The blastocyst consists of a hollow fluid-filled ball
of cells and an inner cell mass (embryonic stem cells) from which
the embryo develops.
"


http://en.wikipedia.org/wiki/Blastula

"
In mammals, blastulation leads to the formation of the blastocyst, which must not be confused with the blastula; even though they are similar in structure, their cells have different fates. The blastocyst consists of two primary cell lines: the inner cell mass, also known as the epiblast, and the trophoblast. The former is the source of embryonic stem cells and gives rise to all later structures of the adult organism. The latter combines with the maternal endometrium to form the placenta in eutherian mammals.
"

 

[allstardentist]

http://scienceweek.com/2000/sw000121.htm

"
*morula/blastocyst stage: The "morula" is an early
embryonic *cleavage stage consisting of a solid mass of cells
(blastomeres). The next stage is the "blastula" stage, in which
the cells form a hollow sphere. The "blastocyst" is an early form
of the blastula stage, a mammalian egg in the later stages of
cleavage. The blastocyst consists of a hollow fluid-filled ball
of cells and an inner cell mass (embryonic stem cells) from which
the embryo develops.
"


http://en.wikipedia.org/wiki/Blastula

"
In mammals, blastulation leads to the formation of the blastocyst, which must not be confused with the blastula; even though they are similar in structure, their cells have different fates. The blastocyst consists of two primary cell lines: the inner cell mass, also known as the epiblast, and the trophoblast. The former is the source of embryonic stem cells and gives rise to all later structures of the adult organism. The latter combines with the maternal endometrium to form the placenta in eutherian mammals.
"

😕

 

[student1985]

😕

Allstar, don't worry, blastula and blastocyst are the same thing. You won't get a question asking to differentiate between the two. For my studying, whenever i saw blastula, I interpereted it to mean the blastula of a human, frog, or chicken. But just for reassurance:

"At the completion of cleavage, the embryo has over 100 cells arranged around a central cavity and has traveled down the oviduct to the uterus. This embryonic stage, the blastocyst, is the mammalian version of the blastula." Cambell's Bio pg. 1000

 

[allstardentist]

yeah hopefully it wont be on the test. thnx for the help tho and also to dat student.