meninges
crust
The top layer of soil, called the topsoil, is closest to the surface. It is the layer that contains most of the organic matter and nutrients needed for plant growth.
The O horizon forms last in the soil profile as it consists of organic material like decaying leaves and plant matter on the soil surface. It is considered the top layer of the soil profile and is constantly being replenished by new organic material entering the system.
a skin
it is the top layer of the earth's surface consisting of rock and mineral particles mixed with organic matter.
Aluminum forms a thin layer of aluminum oxide on its surface when exposed to air, which acts as a protective barrier against further corrosion. This oxide layer prevents oxygen and moisture from reaching the underlying metal, thereby inhibiting the corrosion process.
substratum
Endocardium is the innermost layer of tissue that lines the chambers of the heart.
The human brain has four lobes of the cerebral cortex. Each lobe in the human brain is named from the bone that covers the lobe.
The structure that forms a protective layer rich in glycoproteins on the surface of cells is the glycocalyx. It helps in cell-to-cell recognition, protection from mechanical stress, and acts as a barrier against pathogens.
The layer of bedrock near Earth's surface that forms a continuous shell around the Earth is called the lithosphere. This layer includes the crust and upper part of the mantle and is divided into tectonic plates that move and interact with each other.
An oil layer is a layer of oil that forms on the surface of water due to differences in density. Oil is less dense than water, so when spilled or released into water, it floats on the surface, creating a distinct layer that can have negative impacts on the environment and aquatic life.