allantois वाक्य
उदाहरण वाक्य
मोबाइल
- An amnion, chorion, and allantois are present during embryonic life.
- In other words, the allantois takes no share in its formation.
- Germ cells migrate from near the allantois and colonize the primordial gonads.
- A very small allantois is found in modern amphibians.
- Also, it is a common misconception that the allantois gives rise to the umbilical cord.
- Tbx4 has been shown to be expressed in the allantois, hindlimb, lung and proctodeum.
- Haeckel speculates that the allantois is formed in a similar way in both humans and other mammals.
- The allantois ( 8 ) is a sac that collects the metabolic waste produced by the embryo.
- The allantois regresses into the embryo to give rise to the urinary bladder and median umbilical ligament.
- The first of these is the cranial portion which is continuous with the allantois and forms the bladder proper.
- Embryologically, the bladder is derived from the urogenital sinus, and it is initially continuous with the allantois.
- The first to evolve was probably the allantois, a sack that develops from the gut / yolk-sack.
- It is formed by the fusion of the mesodermal layers of two developmental structures : the allantois and the chorion.
- Later came the amnion surrounding the fetus proper, and the chorion, encompassing the amnion, allantois, and yolk-sack.
- The allantois, along with the amnion and chorion ( other embryonic membranes ), identify humans, and other mammals, as amniotes.
- Additional factors that are important in HSC migration during this period are Integrins, umbilical arteries and the allantois, in which HSCs and endothelial cells are colocalized.
- Further development of the design, like extraembryonic membranes ( amnion, chorion, and allantois ) and a calcified shell, were not essential and probably evolved later.
- :The umbilical cord develops from the embryonic allantois; it will have the baby's DNA . As you've correctly deduced, the placenta is indeed entirely Mom's.
- Although Haeckel is proven right about the allantois, the utilization of Krause s embryo as justification turns out to be problematic, for the embryo is that of a bird rather than a human.
- This bend becomes dilated into a pouch, which constitutes the "'endodermal cloaca "'; into its dorsal part the hind-gut opens, and from its ventral part the allantois passes forward.
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