And do they have an open or closed circulatory system?
2006-11-14 14:51:21 · 3 answers · asked by David W 4 in Science & Mathematics ➔ Biology
More specifically, what organ does a Daphnium need to breathe?
2006-11-14 15:00:59 · update #1
They have internal gill-like structures that allow oxygen to be removed from the stream of water that they maintain past their feeding organs, which they use to filter microscopic algae from the water.
As for their circulatory system, i think it is closed as Daphnia have hearts
2006-11-14 15:01:58 · answer #1 · answered by Ed C 1 · 0⤊ 1⤋
This organism is small enough so it does not have to "breathe" with gills. Instead, it draws the oxygen from its surrounding area by displacement.
2006-11-14 14:58:10 · answer #2 · answered by Anonymous · 1⤊ 0⤋
daphnia are small and they can osmoregulate from their environment.
2006-11-14 14:57:23 · answer #3 · answered by diburning 3 · 1⤊ 0⤋