GED Science Practice 2025 - Free GED Science Practice Questions and Study Guide

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Question: 1 / 400

What is the role of the "Placenta"?

a) Atmosphere of small organisms in water

b) Passage to the stomach and lungs

c) Transfer of oxygen and nutrients to the fetus

The placenta plays a vital role in the development of a fetus during pregnancy. It functions primarily as an interface between the mother and the unborn child, facilitating the exchange of essential substances. Specifically, the placenta allows for the transfer of oxygen and nutrients from the mother's bloodstream to the fetus, which is critical for growth and development. Additionally, it helps remove waste products from the fetal blood back to the mother.

While the other options describe different concepts, they do not pertain to the biological role of the placenta. The atmosphere of small organisms refers to aquatic ecosystems, the passage to the stomach and lungs involves the digestive and respiratory systems, and revolving around the sun relates to astronomical phenomena. None of these options address the specific physiological function that the placenta serves in mammalian reproduction.

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d) Revolving around the sun in the solar system

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