C. Bone marrow is the answer
There isn't really a major risk
False I can’t find any where that says it is
Because when we sit after eating food the food is stored and do not digest
The answer is that Epithelial cells act as a passageway in which the air moves into the lungs. The epithelial cells in the respiratory system would serve as a leak proof barrier that do transports, filters as well as conditions the air one is breathing.
