No, not true.
Many toxins can pass through uncut skin.
Always wear proper protection when handling toxic substances. Especially pesticides and heavy metals are dangerous.
transparent
selectively permeable means that the substance which is selectively permeable allows only selected materials to pass through it.
Most probably they will pass that way. They are toxic to the mother and foetus as well.
If an electric current doesn't pass easily through a substance, such a substance is said to be an INSULATOR.
a medium.
plasma protein
Rubber.
A liquid or gas that can pass through something
Water
In general, microwaves will not pass through water. They have little ability to penetrate this substance.
Most probably they will pass that way. They are toxic to the mother and foetus as well.
Insulator is a substance that does not allow heat to pass through it example air. conductor is a substance that allows heat to pass through it example metal.