PTC stands for phenylthiocarbamide, the chemical structure of PTC resembles toxic alkaloids found in some poisonous plants.
Other influences
Placenta
Your first environment
Transport of nutrients work like our lungs etc. - by diffusion and active transport.
Protected?
No, smoking and alcohol is bad if you are having a baby, because that is just like the baby is drinking alcohol.
Fetal alcohol syndrome is something that you get if your mom was drinking a lot when she was pregnant.
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