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.
Keep Learning with Biology Notes
What is Mucus?
Mucus is a slippery aqueous secretion produced by, and covering, mucous membranes. Mucus serves to protect epithelial cells (that line ...
What is Apoplast?
Inside a plant, the apoplast is the space outside the plasma membrane within which material can diffuse freely. It is ...
What is Aster?
An aster is a cellular structure shaped like a star, comprising of a centrosome and its associated microtubules during the ...
What are Plate tectonics?
Plate tectonics is the theory that Earth's outer shell is divided into several plates that glide over the mantle, the ...
What is Concentration gradient?
A concentration gradient occurs where the concentration of any particles changes over a certain distance. For example if the concentration ...
What is Heterozygote advantage?
A heterozygote advantage describes the case in which the heterozygous genotype has a higher relative fitness than both the homozygous ...
