Answered

Toxins can harm a developing fetus. They usually enter the fetus by the process of:

1. blood flow from the mother to the fetus
2. active transport from the ovary
3. diffusion across placental membranes
4. recombination of genes from the fetus and mother



Answer :

GinnyAnswer

Final answer:

Toxins harm fetuses by crossing placental membranes, which are crucial for protecting the fetus from harmful substances.


Explanation:

Toxins can harm a developing fetus by crossing the placental membranes. The placental barrier, consisting of multiple cell layers, plays a crucial role in protecting the fetus from harmful substances in the maternal blood. These toxins, known as teratogens, can include substances like alcohol and drugs that may negatively impact the developing embryo or fetus.


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