Exercise 1 A&d Of Rat

Front 1

What , phylum, subphylum, class, and order are Rats?

Back 1

Phylum: Chordata
Subphylum: Vertebrata
Class: Mammalia
Order: Rodentia (gnawing mammals)

Front 2

homeothermic-

Back 2

-high body temperature and level of metabolism despite external temperature

Front 3

endothermic-

Back 3

-generate heat internally by metabolic poccesses
-control its loss at the body surface is regulate by varing the rate of blood flow through the skin and by sweating and panting.

Front 4

What thermally insulates the body?

Back 4

-hair(air it traps)
-subcutaneoous fat

Front 5

Rodents are characterized by?

Back 5

-a single pair of enlarged incisor teeth @ the front of both upper and lower jaws.

Front 6

Primates include-

Back 6

Human beings,the great apes, monkeys, and lemurs

Front 7

Most laboratory dissecting rats are-

Back 7

The albino strain of a wild Rat, the Norway Rat

Front 8

hair-

Back 8

-outgrowths of the skin
-entrap a still layer of air and help to insulate the body surface against excessive loss of heat.

Front 9

Why is heat conservation a primary importance?

Back 9

small animals have a large heat-losing surface relative to their heat-producing mass.

Front 10

four general regions

Back 10

-head
-neck
-trunk
-tail

Front 11

External nostrils-
(nares)

Back 11

openings for respiration

Front 12

mouth-

Back 12

D-opening where food comes in
F-part of the digestive system that does the mechanical digestion

Front 13

lips-

Back 13

D-fleshy hair covered skin on rodents around mouth
F-enable mammals to establish an airtight seal around the nipple of the mother

Front 14

philtrum-

Back 14

D-upper lip cleft/ vertical groove

Hint 14

Phil plays the trumpet with his ______ _________ ________.