1. The exchange of gases in the air sacs of the lungs involves the
exchanging of ________________ .
A: oxygen from the lungs to the blood
B: hydrogen from the lungs to the blood
C: carbon dioxide from the blood to the lungs
a. A only
b. A and B only
c. A and C only
d. All of the above
2. Besides the respiratory organs, breathing also involves other systems in
our body. Which of the following are involved?
a. muscular and skeletal systems
b. skeletal and digestive systems
c. muscular and digestive systems
d. digestive and circulatory systems
2007-06-03 02:50:12 · 5 answers · asked by Anonymous in Science & Mathematics ➔ Other - Science
1) C the blood exchanges CO2 for O2
2) A the muscles lift the ribcage, causing the "inhale". The circulatory system is obviously involved, but D is incorrect because it includes the uninvolved digestive
2007-06-03 04:13:49 · answer #1 · answered by Treefrog 43 2 · 0⤊ 0⤋
1 A
2007-06-03 07:36:57 · answer #2 · answered by JOHNNIE B 7 · 0⤊ 0⤋
1 a 2d
2007-06-03 02:56:43 · answer #3 · answered by Anonymous · 0⤊ 0⤋
That's the beauty of helping strangers... but you're the only one who's ever thanked the community. I applaud that :)
2016-05-20 00:32:34 · answer #4 · answered by ? 3 · 0⤊ 0⤋
1. a
2. d
2007-06-03 03:30:36 · answer #5 · answered by iNevItAbLe 1 · 0⤊ 0⤋