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Hibernation and Migration
Vocabulary
Amphibian:
any of a class (Amphibia) of exothermic vertebrates (as frogs, toads,
or
newts) intermediate in many characteristics between
fishes and reptiles and
having gilled aquatic larvae and air-breathing adults
Bird:
any of a class (Aves) of endothermic vertebrates distinguished by having
the
body more or less completely covered with feathers and the forelimbs modified as
wings
Exothermic:
having a body temperature not internally regulated but approximating
that of the environment (cold-blooded)
Endothermic:
having a relatively high and constant body temperature independent
of the surroundings (warm-blooded)
Hibernate:
a severe reduction in body temperature (but always above the freezing
point)
for long periods of time, resulting in a decreased metabolism and respiration
(for example lowering from 98.6 o to 55 o);
requires a period of time for the
animal to become fully active again
Insect:
an animal of phylum Arthropoda, class Insecta with well-defined
head,
thorax, and abdomen, only three pairs of legs, and typically one or two pairs of
wings
Mammal:
any of a class (Mammalia) of higher vertebrates animals that nourish
their
young with milk secreted by mammary glands and have the skin usually more
or less covered with hair of dermal origin
Migrate:
to periodically or seasonally pass distances greater than 100 miles from
one region or climate to another for feeding or
breeding
Reptile:
any of a class (Reptilia) of vertebrates that include the alligators and
crocodiles,
lizards, snakes, turtles, and extinct related forms and are characterized
by ribs attached to the sternum and a body usually covered with scales or bony
plates
Storage:
the act of storing or safekeeping of goods
Torpor:
a slight lowering of the body temperature (a “suspended animation”) of an
animal by 10 o to 20 o below normal, but normally
significantly above the ambient
temperature (for example 98.6 o
lowered to 80 o) to conserve energy in order to
survive a cold spell; can resume an active start relatively quickly compared to
hibernation
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