Cell wall because it protects the cell membrane.
Answer:
Bed bugs belong to the Cimicidae family (that's Latin for bloodsucking wingless bugs). They come in the order of Hemiptera.
I think it is C. Just 95% sure tho
The effects<span> of </span>tobacco smoke<span> on the </span>respiratory system<span> include: irritation of the trachea (windpipe) and larynx (voice box) reduced lung function and breathlessness due to swelling and narrowing of the lung airways and excess mucus in the lung passages.</span>