Answer: layers
of sheathing
The
brain is protected by the skull and several layers of sheathing
from physical damage and insulate it against extreme temperatures. It is
encapsulated in several layers of connective tissue sheathing known as meninges
protecting fragile neural tissue and insulate the brain from different extreme temperature.
A chemical change is occurring when the food is being broken down, while an irreversible change is happening when the proteins become denatured
They regulate their fat content in feeding themselves
By delivering nutrients from food to cells.
♣Amaranthine
