BI-2203
Fertilisation and early development
Biology · Secondary 4 · Medium · Fertilisation and early development
In the placenta, the mother’s blood and the fetus’s blood flow close together but do not mix.
Which substances are at a higher concentration in the mother’s blood than in the fetus’s blood as they meet in the placenta?
Which substances are at a higher concentration in the mother’s blood than in the fetus’s blood as they meet in the placenta?
- carbon dioxide and urea
- oxygen and glucose
- urea and amino acids
- carbon dioxide and oxygen
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