a) B – Lungs
C – Gills/ Gill
b) Gaseous exchange
Excretion of carbon (IV) oxide.
c) B1 – Ring cartilage/ ringed cartilage;
Ring of cartilage / cartilaginous ring;
B2 – (Left) Lung.
B3 – Heart
d) K1 – Gill raker(s)
K2 – Gill arch/ Bar
K3 – Gill filaments
sharon kalunda answered the question on September 13, 2019 at 08:30
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