Answer:
move air towards the lungs and warm, moisten, filter
Explanation:
the upper respiratory system incldues your mouth, nose, trachea, and a portion of your lungs
Answer:Yep u have to ask s1 else
Explanation:
Answer:
Development that takes place before the age of nine.
Primary sexual characteristics appear at birth and comprise both the external and internal genitalia (e.g., the penis and testes in men and the vagina and ovaries in women).
