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Text 13
I. Read the text and say what it is about.
AMPHIBIANS - CLASS AMPHIBIAN
The class Amphibian includes salamanders, frogs, toads and a few
wormlike tropical animals called caecilians. Frogs and toads are not likely to be
confused with any other vertebrates, but some of the salamanders greatly
resemble lizards, which are reptiles. ^Salamanders, however, have smooth moist
skins without scales, whereas a lizard skin is scaly and rough.] Amphibian cha-
racteristics include a three-chambered heart and well-developed limbs which
have replaced the fine of fish. The eggs of most amphibians are deposited in
water. The young respire by means of gills; the adults of some species which
have lungs leave thewater] The name Amphibia, meaning "double life", was
given this class because во many members of it live both on land and in water.
Amphibians are said to be cold-blooded, which means that their body
temperature varies with the environment ^Consequently, during cold weather
many amphibians hibernate; they bury themselves in mud or moist soil, the body
temperature drops, and all physiological activities are greatly slowed dow-J
With the return of warm weather the amphibians emerge, often congregating in
the water In hordes to breed. Some amphibians also aestivate during dry periods.
v^ \Jjiving amphibians are classified into three orders - the Gymnophiona,
Caudata, and Salientia. Numerous extinct species have also been discovered^
II. Remember the following words, consult a dictionary about the way they are
pronounced.
amphibia амфибии; земноводные
amphibian земноводный, амфибия
salamander саламандра
frog лягушка
toad жаба
caecilian червяга, червяги
vertebrate позвоночное животное
lizard ящерица
reptile пресмыкающееся
moist влажный
scale чешуя
limb конечность
fin плавник
deposite класть, осаждать
respire дышать
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