Frog — Body divisible into
three regions-head, neck
and trunk
Rat — Left kidney is slightly higher in position than the right one
Earthworm — The alimentary canal
consists of a sequence
of pharynx, oesophagus,
stomach, gizzard and
intestine
Cockroach — 10 pairs of spiracles (2 pairs on thorax and 8 pairs on abdomen)
