1. The functions of the respiratory system are (choose 2)

Question

A. to pump blood to the body**
B. to deliver oxygen to the body**
C. to remove carbon dioxide from the body
D. to absorb nutrients

2. ______ is a substance in tobacco products that causes stained teeth and skin

A. Nicotine
B. Carbon minoxide
C. Tar**
D. Menthol

Answer 1

Actually for 1. I think its B and C

Answer 2

b and a for number 1 and a for number 2

Answer 3

1. b
2.c

Answer 4

NUBs

Answer 5

ummmm im sure there is more than 2 questions there is 5 acctuly ._.