noun / verb
mantle
MAN-tuhl/ˈmæntl/
A cloak laid over the body as a covering.
A blue mantle covers the woman's shoulders and dress.

Etymology
A cloak surrounds and covers its wearer. That physical image broadened into the sense of anything that enshrouds or covers something, including a covering layer.
In context
it has a layer of tissue called the mantle a soft layer of its body covered in this thing called the mantle
More examples
- He fastens his mantle at the neck before stepping outside.
- The actors hang their mantles backstage after the performance.
- Attendants mantle the queen in velvet before the ceremony.
Forms
mantle · mantles · mantled · mantling