Sentences with phrase «yolk sac»
The phrase "yolk sac" refers to a small pouch that develops in the early stages of an embryo. It provides nutrients to the growing embryo before it is able to get nutrients from the mother. Full definition
The researchers knew they could carry out a relatively straightforward isolation of the FcRY receptor by passing a solution of yolk sacs through a separation column containing IgY under acid conditions — causing the receptor to stick to the IgY.
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During this time your baby will receive critical nutrients and nourishment from the membranous yolk sac attached to the embryo.
During this time your baby will receive critical nourishment from the membranous yolk sac attached to the embryo.
Some grew more slowly and were smaller than normal embryos; others had abnormally large yolk sacs.
When this microRNA was genetically removed, both ES and iPS cells were able to expand their developmental decisions to generate embryo cell types as well as placenta and yolk sac linages.
The team has named them «expanded - potential stem cells» (EPSCs), because — unlike any other stem cells made in the lab — they are able to create placenta and yolk sac tissue.
«But all that had been shown previously was that there was an IgY binding activity on yolk sacs.
Within the hematopoietic system that produces all blood cells, tissue «resident» macrophages are a lineage of myeloid cells that arise from yolk sac - derived progenitors and that self - maintain in their tissue of residency, independently of adult hematopoietic stem cells (HSC).
Pineal region tumors: This group of tumors includes germ cell tumors, germinomas, non-germinomatous germ cell tumors, embryonal cell tumor, yolk sac tumors, teratomas (immature vs. mature), pinealoblastomas, and pineocytomas.
For a silky - smooth lemon curd without the need to use a strainer or an immersion blender, as you crack each egg pinch off the white twisted strands or fibers attached to each yolk sac.
You might need to make the potato walls a little more distinct to hold in the eggs — I just pushed things apart with my fingers because the yolk sac settles right into the dent, which the liquid eggs may or may not do without thicker walls.
The big news this week is that your baby's heart will begin to beat, but even with the most sensitive ultrasound, a transvaginal ultrasound, you typically can't see the heart beat yet, but you can see a yolk sac.
During week 5, the yolk sac forms and the baby starts developing.
Yolk sac: The yolk sac produces your babies» red blood cells and delivers nutrients until the placenta is ready to take over this duty.
During this process, part of the yolk sac is incorporated into the lining of the digestive system.
Your baby's first blood cells are already being produced in the yolk sac.
I had an idea about the size the baby would be at 8 weeks, like a little peanut, all I saw was a «yolk sac» as the ultrasound tech called it.
Inside the blastocyst, one type of embryonic stem cells will become the yolk sac.
A unique feature of placental mammals, extra-embryonic tissues such as the placenta and yolk sac are vital for nutrient and waste exchange between the fetus and mother.
Two mice also developed cysts in their abdomen that resembled very early embryos, with a yolk sac and the first signs of blood cell development.
They are surrounded by two other types of cells, which become the placenta and another structure, the yolk sac.
In chickens, they are passed to embryos across the yolk sac membrane of the egg.
In the mouse embryo, red blood cell formation, or erythropoiesis, is seen in the blood islands in the mesoderm surrounding the yolk sac.
Within this elementary biological structure, three types of cells begin to cluster and develop: the embryonic stem cells (which eventually become the body of the embryo), and two extra-embryonic types of cells - the trophoblast stem cells (which develop into the placenta) and the endoderm stem cells (which go on to form the yolk sac).
However, despite this consensus view there is some evidence from blastocyst injection that ES cells can colonize the yolk sac descendants of the PrEn [23].
When they have consumed all of the yolk sac and grown in size, these fish emerge from the gravel, and are then considered fry and they begin to feed.