Biology, asked by nimratanveer69, 5 hours ago

how many membranes does oxygen cross to move from alveoli to tissue level
a 4
b 5
c 7
d 9

Answers

Answered by yashjadhav0088

0

Answer:

9

Explanation:

5770 of you vlciflcjvjsovfyiitsgk. iam மராத்தி

Answered by khizrasaqlaini

0

Answer:

I think 7 level I am right

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