Question

http://prntscr.com/ihfeiv

Answer 1

@JustSaiyan

Answer 2

@tigerlover

Answer 3

It's plasma / serum, although I'm not sure what they mean by "surrounding"...

Answer 4

Thanks http://prntscr.com/ihfkey

Answer 5

I know that blood helps resist pH changes, I don't remember the skeleton doing anything with pH levels (and calling it a skeleton instead of bones kind of indicates that's the wrong answer), and lymph nodes are for fighting infections, not really for keeping pH levels stable. I think the correct answer is B.

Answer 6

Okie thanks

Answer 7

Np