In humans, the placenta is essential to the embryo for RESPIRATION, NUTRITION AND EXCRETION.
The placenta refers to an organ in the uterus of pregnant mammals that is responsible for nourishing and maintaining the unborn baby through the umbilical cord. Th placenta has many functions but primarily it plays critical roles in the nutrition, respiration and excretion of the fetus. Its other functions include: production of hormones, production of immunity for the fetus for prevention from infections, etc. <span />
<span>The brain stem is closest to the spinal cord.</span>
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So this is just a guess but i think its D but like I said its a guess.
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becuase plants make up surrounding areas, if you see no plants and soil with no fertilization from plants it is most likely a desert, and a place with tall and thick plants is most likely a forest
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Many of the baleen eyeglass frames seen in advanced collections probably date from the late 17th to the very early 19th century. ... Whalebone is easy to carve and shape since it has a pliable almost plastic-like property. As such it was used in various manufacturing industries as a forerunner of plastic.
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