Answer:
D
The tonsils are the “first line of defense” against potential respiratory pathogens. They contain specialized M cells that collect antigens produced by respiratory tract pathogens. The secondary lymphoid tissue within the tonsils functions like the same type of the tissue in lymph nodes.
C
This is because you want to not fall when you are running
Answer:
true.
Explanation:
I searched it up, and found the answer on quizlet.
Answer:
calcium is need to generate movement of bones
