where does fetal tissue come from
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Fetal Tissue Research: FAQ Sept. 29, 2015 -- Although fetal tissue research has made headlines in recent months, the controversy about it is nothing new. Used in scientific studies since the 1930s, the tissue comes from induced abortions and miscarriages that would otherwise be discarded, according to the American Society for Cell Biology (ASCB).Fetal tissue research is legal in the United States.ndiana, Ohio, North Dakota, Oklahoma, and South Dakota ban studies involving tissue from aborted fetuses, and several other states are considering restricting or banning it, says Elizabeth Nash of the Guttmacher Institute, an abortion rights nonprofit organization in Washington, D.C.
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Amniotic fluid Amniotic fluid is present in the amniotic sac. It is generated from maternal plasma, and passes through the fetal membranes by osmotic and hydrostatic forces. When fetal kidneys begin to function in about week 16, fetal urine also contributes to the fluid. The fluid is absorbed through the fetal tissue and skin. After the 20th-25th week of pregnancy when the keratinization of an embryo's skin occurs, the fluid is primarily absorbed by the fetal gut.
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The Fetal Life-Support System: Placenta, Umbilical Cord, & Amniotic Sac The Fetal Life-Support System: Placenta, Umbilical Cord, & Amniotic Sac. Your baby will develop inside your uterus with the help of a fetal life-support system composed of the placenta, the umbilical cord, and the amniotic sac (which is filled with amniotic fluid).
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Derivation of Tissues Epithelial tissue derived from ectoderm is generally squamous epithelium; epithelial tissue derived from endoderm is essentially glandular epithelium. There are a variety of body tissues derived from the third or middle primary germ layer known as the mesoderm. These body tissues include: 1  Muscles. 2  Fibrous tissue.
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10.2 Development of the placental villi Maternal and fetal tissues form two units that are closely bound together at the placental level. Quiz. The fetal part of the placenta is made up of the chorionic plate with its placental villi, the cytotrophoblast layer and the intervillous spaces.The chorionic plate (great part of the placenta on the fetal side) consists of the amnion, the extra-embryonic mesenchyma, the cytotrophoblast and the syncytiotrophoblast.he fetal part of the placenta is made up of the chorionic plate with its placental villi, the cytotrophoblast layer and the intervillous spaces.
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The role of fetal microchimerism in autoimmune disease Initial publications of the relatively recent discovery of fetal microchimerism occurred in the late 1970's [ 7 ]. Fetal microchimerism is the transfer of intact living fetal cells from the fetal circulation into the maternal circulation and occurs in all pregnancies and increases with gestational age [ 8 - 10 ].ost-abortion and the incidence of fetal microchimerism. There is an increased fetal-to-maternal transfer of fetal undifferentiated progenitor cells during an abortion procedure as the placenta is being destroyed [ 54 - 56 ].
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Where Do Stem Cells Come From? If the embryos have been kept in the freezer for one year or longer, parents may choose to: A second source of stem cells can be obtained from aborted fetuses, where the germ cells (ovaries and testes) are of particular interest. A third source of stem cells, known as multipotent stem cells, can be found in many types of adult tissue such as bone marrow, adipose tissue (fat), and umbilical cord blood. Adult stem cells are needed every day to replenish a variety of cell types in our body that normally wear out and die in large numbers.
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The Placenta and Fetal Membranes What are the two parts of the placenta. Fetal part of the placenta, formed by the villous chorion, its villi project into the intervillous space containing maternal blood. Maternal part of the placenta, formed by the decidua basalis. By the end of the fourth month the decidua basalis is replaced by the fetal part of the placenta. What connects the fetal and the maternal portion of the placater together. The fetal part of the placenta, is attached to the maternal part by the cytotrophoblastic shell, the external layer of trophoblastic cells on the maternal surface of the placenta.
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Fun Fact: Your Babyâs Cells Remain Inside You Long After Childbirth Once birth happens, this number drops significantly, but fetal cells stick around to help mothers fight disease: Fetal cells show up significantly more often in the breast tissue of women who don’t have breast cancer than in women who do (43 versus 14 percent).
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10.2 Development of the placental villi The basal plate, the peripheral region of the placenta on the maternal side that is in contact with the uterine wall, is made up of two tissues: embryonic tissue (cytotrophoblast, syncytiotrophoblast), on the one side, and of maternal tissue (decidua basalis) on the other.
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Prenatal development Fetal hematopoiesis first takes place in the yolk sac. The function is transferred to liver by 10th week of gestation and to spleen and bone marrow beyond that. The total blood volume is about 125 ml/kg fetal body weight near term.
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Amniotic fluid yields alternatives to embryonic stem cells The fluid contains stem cells that come from the fetus. These cells have a more limited capacity to develop into different cell types than stem cells in the embryo.
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Fetal Circulation This is because the mother (the placenta) is doing the work that the baby’s lungs will do after birth. The placenta accepts the bluest blood (blood without oxygen) from the fetus through blood vessels that leave the fetus through the umbilical cord (umbilical arteries, there are two of them).When blood goes through the placenta it picks up oxygen and becomes red.The red blood then returns to the fetus via the third vessel in the umbilical cord (umbilical vein). The red blood that enters the fetus passes through the fetal liver and enters the right side of the heart.he ductus arteriosus sends the bluer blood to the organs in the lower half of the fetal body. This also allows for the bluest blood to leave the fetus through the umbilical arteries and get back to the placenta to pick up oxygen.
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- Shares 241. Your baby will develop inside your uterus with the help of a fetal life-support system composed of the placenta, the umbilical cord, and the amniotic sac (which is filled with amniotic fluid).
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Blood Circulation in the Fetus and Newborn During pregnancy, the fetal circulatory system works differently than after birth: The fetus is connected by the umbilical cord to the placenta, the organ that develops and implants in the mother's uterus during pregnancy. Through the blood vessels in the umbilical cord, the fetus receives all the necessary nutrition, oxygen, and life support from the mother through the placenta. Waste products and carbon dioxide from the fetus are sent back through the umbilical cord and placenta to the mother's circulation to be eliminated. Click to Enlarge. The fetal circulatory system uses two right to left shunts, which are small passages that direct blood that needs to be oxygenated.
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- This is best done by separating tissues with a blunt probe and by picking away connective tissue (CT) from the blood vessels with a forceps. In a fetus, the placenta is the source of oxygen and nutrients, and also removes metabolic wastes from the blood. The lungs, digestive tract, and kidneys are nonfunctional.ositioning the pig for dissection Place the fetal pig on a dissecting tray ventral (belly) side up. Use two or three rubber bands to tie the right hind leg around the ankle. Run the rubber bands around the underside of the tray and tie the left hind leg.
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Baby's genome hidden in mother's blood The fetal DNA in a mother's blood can already reveal an infant's sex and other traits inherited from the father. But picking out a fetus's entire genome from its mother's is much tougher, says Dennis Lo, a chemical pathologist at the Chinese University of Hong Kong, who led the study.
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- Best Answer: The placenta comes from cells that belong to the embryo and, therefore, is part of the embryo/baby.Since the placenta/uterine wall junction is the site of gas, nutrient, and waste exchange between the embryo's blood and the mother's blood, the blood supplies are totally separate, too.est Answer: The placenta comes from cells that belong to the embryo and, therefore, is part of the embryo/baby.
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Fetal bovine serum Fetal bovine serum (FBS) or fetal calf serum is the blood fraction remaining after the natural coagulation of blood, followed by centrifugation to remove any remaining red blood cells. Fetal bovine serum comes from the blood drawn from a bovine fetus via a closed system of collection at the slaughterhouse.Fetal bovine serum is the most widely used serum-supplement for the in vitro cell culture of eukaryotic cells.his is due to it having a very low level of antibodies and containing more growth factors, allowing for versatility in many different cell culture applications. The globular protein, bovine serum albumin (BSA), is a major component of fetal bovine serum.
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- 1 1989: Pera et al., derive a clonal line of human embryonal carcinoma cells, which yields tissues from all three primary germ layers. 2  The cells are aneuploid (fewer or greater than the normal number of chromosomes in the cell) and their potential to differentiate spontaneously in vitro is typically limited. The teratomas include cell types derived from all three primary germ layers, demonstrating the pluripotency of human ES cells [ 48 2  ]. Gearhart and colleagues derive human embryonic germ (EG) cells from the gonadal ridge and mesenchyma of 5- to 9-week fetal tissue that resulted from elective abortions.
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Stem cells, cloning and related issues (All blood cells in the body are manufactured in the bone marrow.) Umbilical cord blood, extracted from the umbilical cord and placenta when a baby is born, is a rich source of adult stem cells. These cells may be useful for medical research or therapeutic use in the future.
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Glossary of Pregnancy Words A biopsy of tissue is taken from inside the uterus through the abdomen or the cervical opening (through the vagina) to determine abnormalities of pregnancy. Colostrum-Thin, yellow fluid that is the first milk to come from the breast. Most often seen toward the end of pregnancy.
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- Carbon is also a part of the ocean, air, and even rocks. Because the Earth is a dynamic place, carbon does not stay still. It is on the move! In the atmosphere, carbon is attached to some oxygen in a gas called carbon dioxide.Plants use carbon dioxide and sunlight to make their own food and grow. The carbon becomes part of the plant. Plants that die and are buried may turn into fossil fuels made of carbon like coal and oil over millions of years.n the atmosphere, carbon is attached to some oxygen in a gas called carbon dioxide. Plants use carbon dioxide and sunlight to make their own food and grow. The carbon becomes part of the plant.
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Research LettersMicrochimerism in female bone marrow and bone decades after fetal mesenchymal stem-cell trafficking in pregnancy However, fetal stem cells in maternal marrow could also act as a long-term reservoir of stem cells and might even explain why women live longer than men and why pregnancy protects against susceptibility to some diseases.
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Fetal circulation Blood from the placenta is carried to the fetus by the umbilical vein. In humans, less than a third of this enters the fetal ductus venosus and is carried to the inferior vena cava, while the rest enters the liver proper from the inferior border of the liver. The branch of the umbilical vein that supplies the right lobe of the liver first joins with the portal vein. The blood then moves to the right atrium of the heart. In the fetus, there is an opening between the right and left atrium (the foramen ovale), and most of the blood flows through this hole directly into the left atrium from the right atrium, thus bypassing pulmonary circulation.
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- Blood cells are constantly formed through a process called hematopoiesis (also called hemopoiesis). The hematopoietic stem cells —those that give rise to blood cells—originate in the yolk sac of the human embryo and then migrate to the liver.Hematopoiesis thus occurs in the liver of the fetus.ymphoid tissue includes the lymph nodes, tonsils, spleen, and thymus. The bone marrow produces all of the different types of blood cells; the lymphoid tissue produces lymphocytes derived from cells that originated in the bone marrow. Hematopoiesis begins the same way in both myeloid and lymphoid tissue.