: If chemically nothing is ever created or destroyed but simply transformed, where does the matter come from when a sperm cell grows to a full body?

Question

I know obviously how the cell divides and becomes more and more complex over time. I get that the biological code is in the original cell, but where does the matter come from? In my mind, I imagine the first cell as an architect with all the blueprints, but without any material. It doesn’t pop out of nowhere, right?

In: Biology

Answer 1

The sperm goes in the egg, the egg is stuck on the uteran wall inside the vagina, at some point it becomes attached to the host mother and the umbilical cord forms which basically steals nutirents from mom to grow.