Page 262 - New Medley 5 Semester 1
P. 262
l Reptiles like lizards, crocodiles and tortoises crawl on the land with their
short legs.
l Snakes do not have legs. They crawl with the help of plates and scales
attached to the under side of their bodies.
l Fast running land animals like horse, deer,
cheetah, etc. have long legs and a flexible
backbone which help them increase the length
of their stride.
l Animals like kangaroos hop with highly Kangaroo
developed hind legs having extra-large muscles.
Movement in aquatic animals takes place in different
ways.
l Paramecium has many hair-like structures called cilia
for movement. Paramecium
l Fishes have fins for swimming. They have both paired
and unpaired fins. The two pairs of paired fins help them
move forwards. The unpaired fins help in maintaining Fish
the balance and the tail fin is used for changing direction
while swimming.
l Turtles have their forelimbs and hindlimbs modified
into paddle-like structures which help them push the Turtle
water and move forwards.
l Penguins have forelimbs modified into
flippers which help them swim in water.
They use their short hindlimbs to walk
on land.
Penguin Duck
l Ducks and swans have webbed-feet to
swim and wading limbs to wade in water.
l Frogs use their webbed-feet to swim in water and long
hindlimbs to hop on land.
Movement in aerial or flying animals also occurs in
different ways.
Frog
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