The only vertebrates in which blood flows directly from respiratory organs to bo

Author Question: The only vertebrates in which blood flows directly from respiratory organs to bo (Read 474 times)

luvbio

Hero Member
Posts: 623

on: Sep 7, 2013

The only vertebrates in which blood flows directly from respiratory organs to body tissues without first returning to the heart are the
A) amphibians.
B) birds.
C) fishes.
D) mammals.
E) reptiles.

coco

Hero Member
Posts: 739

Reply #1 on: Sep 9, 2013

Choose C

GL

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