Fetal membrane and Tissue layer

Fetal membrane noun - Any membrane that functions for the protection or nourishment or respiration or excretion of a developing fetus.

Tissue layer and fetal membrane are semantically related. In some cases you can use "Tissue layer" instead a noun phrase "Fetal membrane".

Tissue layer noun - A pliable sheet of tissue that covers or lines or connects the organs or cells of animals or plants.

Fetal membrane and tissue layer are semantically related. Sometimes you can replace phrase "Fetal membrane" with "Tissue layer", this phrases are similar.