D smoking damages cilia in the trachea and more particles enter the lungs
I think its true
Hope this helps :)!
Answer:
Thats a trick question, they are all parts of the back/spine
Explanation:
A. long, appendicular skeleton
Answer:
Oxygen-poor blood returns from the body to the heart through the superior vena cava (SVC) and inferior vena cava (IVC), the two main veins that bring blood back to the heart. The oxygen-poor blood enters the right atrium (RA), or the right upper chamber of the heart.
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