1. The exchange of carbon dioxide and oxygen takes place in the

Question

A. alveoli**
B. asthma
C. bronchi
D. diaphragm

2. ________ is a substance in tobacco smoke that reduces the blood ability to carry oxygen

A. Tar
B. Nicotine
C. Asthma
D. Carbon monoxide**

Check

Answer 1

1. is correct
2. I'm not sure on. I think you maybe be right

Answer 2

A AND B

Answer 3

A and B I agree now that I re-read this.

Answer 4

a and d is correct

Answer 5

A
D

Answer 6

number two is tar

Answer 7

1. to deliver oxygen to the body
to remove carbon dioxide from the body
2. diaphragm
3. alveoli
4. tar
5. carbon monoxide