1. the exchange of carbon dioxide and oxogen takes place in the

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

2. _______ is a substance in tabacco products that causes stained teeth and skin.
A.nicotine
B.carbon monoxide****
C.tar
D.menthol

3. _______ is a substance in tabacco smoke that reduces the bloods ability to carry oxygen.
A.tar
B.nicotine***
C.asthma
D.carbon manoxide

it would really help if anyone could help me and im in connections academy

1) to deliver oxygen to the body- to remove carbon dioxide from the body {B,C}

2) diaphragm {D}
3) alveoli {A}
4) Tar {C}
5) Carbon monoxide {D}

sorry i couldn't help u earlier k.c undercover

took the test an now i know the answers so #1 is A

#2 is c tar
and #3 is D
so glad that i could help

can you help at all

anyone

i got a 66 thx people for no help

1. The exchange of carbon dioxide and oxygen takes place in the alveoli. The alveoli are tiny air sacs in the lungs where the exchange of gases between inhaled air and the bloodstream occurs. To find this answer, one can refer to a biology textbook, specifically a chapter or section on the respiratory system.

2. The substance in tobacco products that causes stained teeth and skin is carbon monoxide. Carbon monoxide is a poisonous gas that is present in tobacco smoke. It binds to hemoglobin in the blood, reducing its capacity to carry oxygen. This can lead to a variety of health problems. To find this answer, one can refer to reliable sources such as medical websites, articles, or books on the effects of tobacco use.

3. The substance in tobacco smoke that reduces the blood's ability to carry oxygen is tar. Tar is a dark, sticky substance that is produced when tobacco is burned. It contains numerous harmful chemicals that can damage the respiratory system and reduce lung function. To find this answer, one can again refer to reliable sources such as medical websites, articles, or books on the effects of tobacco use.