« ORGANIZATION OF PLACENTA TROPHOBLAST ULTRASTRUCTURE From the electron microscopic studies of Wislocki and Dempsey (1955), data were provided that permitted a ...» Document abstract
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medical studies
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26/11/2007
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SummaryFrom the electron microscopic studies of Wislocki and Dempsey (1955), data were provided that permitted a functional interpretation of the fine structure of the placenta. There are prominent microvilli on the syncytial surface, corresponding to the "brush border" described by light microscopy. Associated pinocytotic vacuoles and vesicles are related to the absorptive and secretory placental functions. The inner layer of the villi—the cytotrophoblasts—persists to term, although often compressed against the trophoblastic basal lamina, and retains its ultrastructural simplicity.
Table of Contents- TROPHOBLAST ULTRASTRUCTURE
- PLACENTAL COTYLEDONS
- BREAKS IN THE PLACENTAL "BARRIER"
- PLACENTAL SIZE AND WEIGHT
- PLACENTAL AGING
« use of standard definitions is encouraged by the World Health Organization as well as of whether the umbilical cord has been cut or the placenta is attached. ...» Document abstract
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Language : english
medical studies
school essay
date published
19/11/2007
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SummaryHealthier mothers and babies ranks as one of the 10 great public health achievements in the United States between 1900 and 1999. At the beginning of the century, almost 1 in every 100 women giving birth in this country died of pregnancy-related complications, and nearly 1 of 10 infants died before age 1 year (Centers for Disease Control, 1999b). By the end of the 20th century, infant mortality had declined more than 90 percent to 7.2 per 1000 live births in 1997, and the maternal mortality rate declined almost 99 percent to 7.7 deaths per 100,000 live births in 1997.
Table of Contents- The vital statistics of the United States are collected and published through a decentralized, cooperative system (Tolson and colleagues, 1991).
- It is recommended that United States statistics include all fetuses and infants born weighing at least 500 g, whether alive or dead.
- Definitions recommended by the National Center for Health Statistics and the Centers for Disease Control and Prevention are...
- Postterm infant.
- Direct maternal death.
- Nonmaternal death
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