| 单词 | trophoblast |
| 例句 | I can see the trophoblast, which would normally become the placenta, enveloping the embryo. Scientists grow whole model of human embryo, without sperm or egg 2023-09-06T04:00:00Z One is called trophoblast; it’s the tissue that would normally form placenta. Scientists Create Human Embryo-like Structures with Stem Cells 2023-06-16T04:00:00Z The trophoblast secretes enzymes that allow implantation of the blastocyst into the endometrium of the uterus. Concepts of Biology 2013-04-25T00:00:00Z Here the cells in the blastula arrange themselves in two layers: the inner cell mass, and an outer layer called the trophoblast. Biology for AP Courses 2022-06-09T00:00:00Z What would happen if the trophoblast did not secrete hCG upon implantation of the blastocyst? Anatomy and Physiology 2013-06-19T00:00:00Z That analysis should include comparing the chemical tags on DNA that influence cell function and sizing up how efficiently the cells differentiate into different types of specialized trophoblast cells. Stem cells offer new glimpse at how the placenta emerges—and how the fetus-sustaining organ can fail 2020-09-30T04:00:00Z Cells from the outer layer of the blastocyst, called trophoblast cells, undergo differentiation. Cell atlas reveals the landscape of early pregnancy 2018-11-13T05:00:00Z In 2017, the team cultured a combination of two types of mouse stem cell: those that form the embryo itself, and some that help to form the placenta, called trophoblast stem cells. The labs growing human embryos for longer than ever before 2018-07-03T04:00:00Z The trophoblast will contribute to the placenta and nourish the embryo. Biology for AP Courses 2022-06-09T00:00:00Z As the blastocyst forms, the trophoblast excretes enzymes that begin to degrade the zona pellucida. Anatomy and Physiology 2013-06-19T00:00:00Z The number of trophoblast was counted based on the expression of constitutive GFP. Blastocyst-like structures generated solely from stem cells 2018-05-01T04:00:00Z In such a milieu, maternal and fetal cells cooperate to regulate trophoblast invasion, remodel the maternal vasculature and provide sufficient nourishment for the fetus. Cell atlas reveals the landscape of early pregnancy 2018-11-13T05:00:00Z The Cambridge team, whose work is published in the journal Science, created their artificial embryo using embryonic stem cells and a second type of stem cell - extra-embryonic trophoblast stem cells - which form the placenta. Artificial 'embryos' created in the lab - BBC News 2017-03-02T05:00:00Z Figure 34.22 The rearrangement of the cells in the mammalian blastula to two layers—the inner cell mass and the trophoblast—results in the formation of the blastocyst. Biology for AP Courses 2022-06-09T00:00:00Z Just a few days after implantation, the trophoblast has secreted enough hCG for an at-home urine pregnancy test to give a positive result. Anatomy and Physiology 2013-06-19T00:00:00Z Derivation and maintenance of murine trophoblast stem cells under defined conditions. Blastocyst-like structures generated solely from stem cells 2018-05-01T04:00:00Z Fisher derived this stem-cell line, which is capable of making trophoblast cells like those found in the placenta, from an eight-cell embryo. Zika highlights role of controversial fetal-tissue research 2016-03-29T04:00:00Z The trophoblast cells that grow into the lining of the uterus when the placenta first forms invade maternal vessels in the uterus and enlarge them to facilitate blood flow for the developing fetus. New Ways to Monitor Pregnancy in Real Time 2015-11-02T05:00:00Z The trophoblast in the blastula contains embryonic stem cells, which arrange themselves into three germ layers. Biology for AP Courses 2022-06-09T00:00:00Z Figure 28.6 Implantation During implantation, the trophoblast cells of the blastocyst adhere to the endometrium and digest endometrial cells until it is attached securely. Anatomy and Physiology 2013-06-19T00:00:00Z The front line of the invasion is a cell called a trophoblast, from the outer layer of the embryo. The Push to Understand the Placenta 2014-07-14T04:00:00Z Dr. Jonathan L. Hecht, associate professor of pathology at Harvard Medical School, said the study was intriguing and “probably true if it finds an association between these trophoblast inclusions and autism.” Study Ties Autism Risk to Creases in Placenta 2013-04-25T04:01:00Z Because the surrogate mother is far less likely to reject a trophoblast from her own species, the developing embryo within has a much better chance of surviving. Will Cloning Ever Save Endangered Animals? 2013-03-11T11:15:00.737Z The inner cell mass contains embryonic stem cells, whereas the germ cells originate from the trophoblast. Biology for AP Courses 2022-06-09T00:00:00Z The yolk sac supplies some nutrients absorbed from the trophoblast and also provides primitive blood circulation to the developing embryo for the second and third week of development. Anatomy and Physiology 2013-06-19T00:00:00Z “The trophoblast cells are so invasive from the get-go,” Dr. Fisher said. The Push to Understand the Placenta 2014-07-14T04:00:00Z Researchers could scoop out the inner cell mass from the hybrid blastocyst, Loi suggests, and transplant it into an empty trophoblast derived from the same species as the surrogate mother. Will Cloning Ever Save Endangered Animals? 2013-03-11T11:15:00.737Z |
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