Theiler Stage1-One-cell egg
三年级下册英语课本
化学世界Fertilized one-cell stage egg(embryo),zona
pellucida prent(shown in red).
0-0.9dpc(range0-2.5)
Scale bar in microns
Theiler Stage2-Dividing egg
Dividing egg stage,zona pellucida prent(shown宝宝肉松
in red).First cleavage occurs at about24hours.
1dpc(range1-2.5)
2-4cells.
Scale bar in microns
Theiler Stage3-Morula
Four-to16-cell stage embryos from early to fully
compacted morula.Zona pellucida prent(shown in
red).Embryos in the oviduct towards utero-tubal
junction.
2dpc(range1-3.5)
4-16cells.
All scale bars in microns.
Theiler Stage4-Blastocyst(ICM apparent)
Embryo progress from morula to the blastocyst
still within the zona pellucida(shown in red).There is
early evidence of the blastocoelic cavity.
3dpc(range2-4)
16-40compacted cells.
All scale bars in microns.
空气属于什么物质
In the blastocyst stage(zona-intact)there is a
distinct inner cell mass and an outer layer of
trophectoderm cells.Usually located in the uterine
lumen.
Theiler Stage5-Blastocyst(zona-free)
Blastocyst(zona-free),invariably located within
the uterine lumen.
4dpc(range3-5.5)
Scale bar in microns
Theiler Stage6-Attachment of blastocyst
Blastocysts implants,first evidence of
embryonic endoderm cells covering
the blastceolic surface of the inner cell
mass.
4.5dpc(range4-
5.5)
Witschi Stage8(rat)
Carnegie Stage4(human)
莽山国家森林公园Scale bar
Theiler Stage7-Implantation and formation of Egg Cylinder
Ectoplacental cone appears.Rapid increa
in the number of inner cell mass cells
leading to the formation of the epiblast with
subquent growth to form the egg
cylinder.The proximal or visceral cells
(opposite side from the trophoblastic cap)
照片风格are cuboidal in shape.Primary endoderm
lines the mural trophectoderm.
5dpc(range4.5-6)
Witschi Stage10(rat)
Carnegie Stage5(human)
Scale
Theiler Stage8-Differentiation of egg cylinder
Implantation site2x3mm.The maternal tissue is
invaded by trophoblast(primary)giant cells and
the ectoplacental cone is invaded by maternal
blood.Differentiation of the egg cylinder into
embryonic and extraembryonic regions and the
formation of the proamniotic cavity.Reichert's
membrane,which is non-cellular and creted by
the distal endoderm first appears.
6dpc(range5-6.5)
Witschi Stage10-11(rat)
Carnegie Stage5(human)
Scale bar in microns
Theiler Stage9-Advanced Endometrial Reaction
PS:Advanced egg-cylinder stage with the first
evidence of of an embryonic axis.There is clear
morphological distinction between the embryonic
and extraembryonic ectoderm.The ectoplacental
靠右行驶的国家cone is further invaded by maternal blood and the
南浔古镇一日游攻略
original lumen of the uterine crypt has
disappeared.
ES:Late in this stage gastrulation begins,
producing the first mesodermal cells.
6.5dpc(range6.25-
7.25)
Downs&Davies PS-ES:prestreak to early
streak
Witschi Stage11(rat)
Carnegie Stage6-7(human-stage table)
Scale bar in microns.
Theiler Stage10-Amnion
Gastrulation continues throughout all
sub-divisions of this stage and:
MS:Tissue at the posterior end of the primitive
streak bulges into the proamniotic cavity and
forms the posterior amniotic fold.
LSOB:In the mesoderm of the posterior amniotic
fold small cavities coalesce to form a single cavity,
the exocoelom.
LSEB:The allantoic bud first appears,gastrulation
continues and the node becomes visible.
7dpc(range6.5-7.5)
Downs&Davies MS-LS midstreak to late
streak
Witschi Stage12(rat)
Carnegie Stage8(human-stage table)
Scale bar in microns.
