Answer:
The upper respiratory system includes the nasal cavity (nose), the pharynx and larynx.
Explanation:
Air enters the body through the nose or mouth, this moistens and warms the air that enters since cold dry air will irritate the lungs. The air then travels down the voice box and down the windpipe.
No cause I have good hygiene by showering, brushing my teeth, and etc everyday :)))
D.
lifting will not cause infertility
Answer:
.brushing twice a day, hope this helps
Regulators are proteins that guide cell to grow,replicate and perform function
External regulators are protiens outside the cell and internal inside so
<span>internal and external regulators are Proteins
so option C is correct
hope it helps</span>
