Q1. [1] straightforward initial-understanding
In fishes, how many chambers does the heart have, and how many times does blood pass through the heart in one body cycle?
(a) Four chambers; twice
(b) Three chambers; twice
(c) Two chambers; once
(d) Three chambers; once
- a Four chambers; twice
- b Three chambers; twice
- c Two chambers; once
- d Three chambers; once