what is a chorion
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chorion frondosum chorion. the outermost of the fetal membranes, composed of trophoblast lined with mesoderm; it develops villi, becomes vascularized by allantoic vessels, and forms the fetal part of the placenta. chorion frondosum. the part of the chorion covered by villi.
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Amniotic Fluid, The Amnion, and the Yolk Sac Vertebrates have four different extraembryonic membranes: the chorion, the allantois, the yolk sac, and the amnion. In vertebrates that lay eggs, the chorion is the outermost membrane and lines the inside of the eggshell.he allantois exchanges oxygen and carbon dioxide with the air outside the eggshell and serves as a disposal site for uric acid. The yolk sac is the extraembryonic membrane that surrounds the egg yolk. The yolk sac has a well-developed vascular system that transports nutrients from the egg yolk to the developing embryo.
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The Placenta and the Fetus: Structure and Function The placenta is composed of both maternal tissue and tissue derived from the embryo. The chorion is the embryonic-derived portion of the placenta. It is composed of trophoblasts, which you may remember are the cells that made up the outer cell layer of the blastocyst.he placenta is the composite structure of embryonic and maternal tissues that supplies nutrients to the developing embryo. The placenta serves three main functions: 1  Attach the fetus to the uterine wall. 2  Provide nutrients to the fetus.
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- For other uses, see Embryo (disambiguation) . An embryo is a multicellular diploid eukaryote in its earliest stage of development, from the time of fertilization through sexual reproduction until birth, hatching, or germination.n humans, this is from the eighth week of gestation. However, animals which develop in eggs outside the mother's body are usually referred to as embryos throughout development; e.g. one would refer to a chick embryo, not a chick fetus even at late stages.
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- The mitochondrion (plural mitochondria) is a double membrane-bound organelle found in most eukaryotic cells. The word mitochondrion comes from the Greek μίτος, mitos, i.e. thread, and χονδρίον, chondrion, i.e. granule or grain-like.
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What is Human Chorionic Gonadotropin? Human chorionic gonadotropin (hCG) is the hormone present in urine that indicates a pregnancy.Injected HCG might cause headaches. HCG is vital to maintaining pregnancy.nitially when a woman gets pregnant, the fetus produces human chorionic gonadotropin, and then later the placenta produces it. For the pregnant woman, the production of HCG is vital to maintaining the pregnancy.
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10 Facts About Subchorionic Hematoma Below are some 10 facts about subchorionic hematoma (and chorionic hematoma): Subchorionic hematoma involves accumulation of blood between membranes of the placenta and the uterus. A more specialized name of the membrane is chorion. A few medical professionals will likewise simply allude to it as a bloodstream clot.
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What is blastocyst? A thin-walled hollow structure in early embryonic development that contains a cluster of cells called the inner cell mass from which the embryo arises. The outer layer of cells gives rise to the placenta and other supporting tissues needed for fetal development within the uterus while the inner cell mass cells gives rise to the tissues of the body.
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Chorioamnionitis: Infection in Pregnancy Chorioamnionitis is a bacterial infection that occurs before or during labor. The name refers to the chorion (outer membrane) and the amnion (fluid-filled sac). These membranes surround the fetus. Chorioamnionitis occurs when bacteria infect the chorion, amnion, and the fluid around the fetus (amniotic fluid). The condition can lead to a preterm birth or serious infection in the mother and the baby. Chorioamnionitis is most commonly seen in preterm births.
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Encyclopedia Definition of:LED TV. A flat panel LCD TV set that uses LEDs (light emitting diodes) for its backlight source rather than the traditional cold cathode fluorescent lamps (see CCFL). Smaller, more power efficient and having a greater optical range than the fluorescents, LEDs produce deeper blacks and more saturated color.
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- egg. 1. The mature reproductive cell of female animals. The nucleus of an egg is capable of fusing with the nucleus of a sperm (the male reproductive cell) to form a new organism. In many species, eggs are produced by the ovaries. An egg carries half as many chromosomes as the other cells of the body. Also called ovum.2.In many animals, a structure consisting of this reproductive cell together with nourishment for the developing embryo and often a protective covering. It is laid outside the body of the female.n egg carries half as many chromosomes as the other cells of the body. Also called ovum. 2. In many animals, a structure consisting of this reproductive cell together with nourishment for the developing embryo and often a protective covering.
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The Effects of Puberty Acne. Acne is also a common effect of puberty that occurs during the preteen and teenage years. The hormones that are released by the body during the process not only help the body mature, but can also cause the sebacious glands to produce more sebum oil, states the American Academy of Dermatology.exual Characteristics. One of the most noticeable effects of puberty is the change in sexual characteristics, which usually starts at around 11 to 12.. For girls, this includes the growing of the breasts, in order to later support nursing a child.
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Human chorionic gonadotropin In molecular biology, human chorionic gonadotropin (hCG) is a hormone produced by the syncytiotrophoblast, a portion of the placenta following implantation.he presence of hCG is detected in pregnancy tests. Some cancerous tumors produce this hormone; therefore, elevated levels measured when the patient is not pregnant can lead to a cancer diagnosis. However, it is not known whether this production is a contributing cause or an effect of tumorigenesis.
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Chorionic hematoma Chorionic hematoma. Chorionic hematoma (also chorionic hemorrhage) is the pooling of blood (hematoma) between the chorion, a membrane surrounding the embryo, and the uterine wall. With an incidence of 3.1% of all pregnancies, it is the most common sonographic abnormality and the most common cause of first trimester bleeding. Cause and diagnosis.
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- The mitochondrion (plural mitochondria) is a double membrane-bound organelle found in most eukaryotic cells. The word mitochondrion comes from the Greek μίτος, mitos, i.e. thread, and χονδρίον, chondrion, i.e. granule or grain-like.Mitochondria range from 0.5 to 1.0 μm in diameter. mitochondrion contains DNA, which is organized as several copies of a single, circular chromosome. This mitochondrial chromosome contains genes for redox proteins, such as those of the respiratory chain. The CoRR hypothesis proposes that this co-location is required for redox regulation.
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Chorionic Villus Sampling (CVS) Chorionic villus sampling (CVS) is a prenatal test that involves taking a sample of tissue from the placenta to test for chromosomal abnormalities and certain other genetic problems. The placenta is a structure in the uterus that provides blood and nutrients from the mother to the fetus,
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- (Answer #1). The chorion is the outer membrane that encloses the embryo in reptiles, birds, and mammals. It is one of four fetal membranes which includes the allantois, amnion, chorion, and yolk sac. The function of the chorion is to contribute to the development of the placenta in placental mammals.The main function of the placenta is to move oxygenated blood into the bloodstream of the developing baby and in turn, move carbon dioxide out. It also ensures that nutrients are received, and wastes are taken away.he function of the chorion is to contribute to the development of the placenta in placental mammals. The main function of the placenta is to move oxygenated blood into the bloodstream of the developing baby and in turn, move carbon dioxide out.
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Chorionic Villus Sampling Chorionic villus sampling (CVS) is a test performed during pregnancy. It determines if an unborn child is at risk for congenital defects. The test can detect more than 200 types of genetic and biochemical conditions. Common risks of the test include bleeding and cramping.
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Mitochondrion The mitochondrion (plural mitochondria) is a double membrane-bound organelle found in most eukaryotic cells. The word mitochondrion comes from the Greek μίτος, mitos, i.e. thread, and χονδρίον, chondrion, i.e. granule or grain-like.Mitochondria range from 0.5 to 1.0 μm in diameter.or instance, red blood cells have no mitochondria, whereas liver cells can have more than 2000. The organelle is composed of compartments that carry out specialized functions. These compartments or regions include the outer membrane, the intermembrane space, the inner membrane, and the cristae and matrix.
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- In molecular biology, human chorionic gonadotropin (hCG) is a hormone produced by the syncytiotrophoblast, a portion of the placenta following implantation.
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embryonic development the vascular structure in the uterus of most mammals providing oxygen and nutrients for and transferring wastes from the developing fetus. •develops from both the chorion and the uterine tissue of mother.
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How Does a $575 Life-Saving Drug Jump to $4,500? Blame a Perverse System To drive awareness of the product, Kaleo has handed out 200,000 Evzio devices free to groups that work with addicts, including to law enforcement, though the company hasn’t released information on how many agencies negotiated deals or what they paid.
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Cholesterol Cholesterol, from the Ancient Greek chole- and stereos followed by the chemical suffix -ol for an alcohol, is an organic molecule. It is a sterol, a type of lipid molecule, and is biosynthesized by all animal cells, because it is an essential structural component of all animal cell membranes and is essential to maintain both membrane structural integrity and fluidity. Cholesterol allows animal cells to function without a cell wall; this allows animal cells to change shape rapidly. In addition to
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- \-klē-ˌī\. 1  1 : a usually round part of most cells that is enclosed in a double membrane, controls the activities of the cell, and contains the chromosomes. 2  2 : the central part of an atom that comprises nearly all of the atomic mass and that consists of protons and neutrons.
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- Definition. noun, singular: mitochondrion. Spherical or rod-shaped organelles found within the cytoplasm of eukaryotic cells, and are referred to as the “powerhouse of the cell since they act as the site for the production of high-energy compounds (e.g. ATP), which are vital energy source for several cellular processes.hat is, they are capable of using glucose and oxygen to produce energy (and releasing carbon dioxide and water in the process) for use in many metabolic processes. Thus, it is not surprising to find several mitochondria in high energy-requiring cells, such as muscle cells.
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- The mitochondrion (plural mitochondria) is a double membrane-bound organelle found in most eukaryotic cells. The word mitochondrion comes from the Greek μίτος, mitos, i.e. thread, and χονδρίον, chondrion, i.e. granule or grain-like.Mitochondria range from 0.5 to 1.0 μm in diameter.he matrix is the space enclosed by the inner membrane. It contains about 2/3 of the total protein in a mitochondrion. The matrix is important in the production of ATP with the aid of the ATP synthase contained in the inner membrane.