Bio dot point Prelim help. (1 Viewer)

[premskies]

Isnt that just lots of blood vessels around the gills to ensure max diffusion of gases into blood?
And yes, stating countercurrent direction is important.

yes.
and thank you, I will definitely add that to my notes

 

[Kimyia]

yes.
and thank you, I will definitely add that to my notes

no worries.
the outcome does state 'compare' so you should be looking out for similarities and differences - like fish have countercurrent but the others don't.