Answer:
Autonomic nervous system
Explanation:
The Autonomic nervous system has to do with the "fight or flight" and "rest and digest" branches. It has to do with increased heart rate, butterflies in the stomach, etc.
Any of ...nitrogen dioxide, Ozone , PM, SO2.
I believe it is lysosomes, because all cells have a cell wall which pretty much limits what goes in and out of the cell as a mitochondria is storage for food and stuff like that. also a nucleus is pretty much the cells brain so all cells have one.
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.
