What is a sentence using the word ectoderm?

Answer 1

I'm sorry, but you'll have to be a bit more specific as to what you want. Unless sentences like the following are useful to you:

"In most vertebrates ectoderm is not lime green in color."

"Ectoderm is not a city in Scotland."

Or, I suppose here's one that might be useful:

"The three germ layers of the early embryo are the ectoderm, mesoderm, and endoderm."

Answer 2

The ectoderm is a germ layer in the early embryo that gives rise to structures like the skin, nervous system, and sense organs.