Placenta Notes: Definitions & Explanations PDF | Download eBooks
Study Placenta lecture notes PDF with biology definitions and explanation to study What is Placenta?. Study placenta explanation with biology terms to review biology course for online degree programs.
Placenta Definition:
Lining of the uterus and the extraembryonic membranes that arise from the embryo form a placenta, a structure in which nutrients diffuse into the embryo from the mother's blood.
Campbell Biology by J.B. Reece, L.A. Urry, M.L. Cain, S.A. Wasserman, P.V. Minorsky, R.B. Jackson
Placenta Notes:
The placenta is a temporary organ that connects the developing fetus via the umbilical cord to the uterine wall to allow nutrient uptake, thermo-regulation, waste elimination, and gas exchange via the mother's blood supply; to fight against internal infection; and to produce hormones which support pregnancy. Placentas are a defining characteristic of placental mammals, but are also found in marsupials and some non-mammals with varying levels of development. After pregnancy is over, placenta is also pushed out of the body.
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