Subsoil: layer of soil under topsoil on the surface of the ground
Topsoil: fertile, upper part of soil
Regolith: unconsolidated residual or transported material that overlies the solid rock on the earth
Bedrock: lies under regolith, can be 100 meters undersurface.
Order of surface: Topsoil --> Subsoil --> Regolith --> Bedrock
Your answer is bedrock
Answer;
-Serous membrane
Explanation;
-Serous membranes are thin membranes that lines the internal body cavities and organs such as the heart, lungs, and abdominal cavity. The thin membrane is made up of mesothelium tissue which originates from the mesoderm.
-These membranes consists of a single layer of flattened mesothelial cells applied to the surface of a thin layer of collagenous tissue that attaches to underlying endothoracic/transversalis fascia. They function to preclude adhesions among organs, thereby allowing organs to move freely relative to one another.
