Transcript
Page 1: Mammalian Adaptations

Mammalian Adaptations

Page 2: Mammalian Adaptations

MONOTREMES“Egg laying”

Duckbilled Platypus

Anteater

Echidna

Platypus/echidna Images from:

http://www.lth3.k12.il.us/tworivers/Pet%20Projects/steve/classification%20of%20animals%202/Page_39_Mammax.html

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MARSUPIALSPremature babies develop in pouch

Most found in Australia/ New Guinea

• Kangaroo

• Wallaby

Image from:

http://www.lth3.k12.il.us/tworivers/Pet%20Projects/steve/classification%20of%20animals%202/Page_39_Mammax.html

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MARSUPIALS

Only North American Marsupial

• Oppossum

Page 5: Mammalian Adaptations

PLACENTALEmbryos nourished inside mother by

placenta

95% of all mammals are placental

At least 18 orders

Image from: http://antro.palomar.edu/animal/default.htm

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Specialized teeth vary with diet

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Grass eaters have different teeth than carnivores

http://animaldiversity.ummzurich.edu/anat/tooth_introduction.html

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INCISORS- cut

CANINES- grip, puncture, tear

PREMOLARS- shread, cut, grind

MOLARS- grind, crushImage from: http://antro.palomar.edu/animal/default.htm

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BALEENThin keratin plates

that hang from the roof of the mouth and screen food from water

Baleen Image from:

http://www.lth3.k12.il.us/tworivers/Pet%20Projects/steve/classification%20of%20animals%202/Page_39_Mammax.html

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EcholocationBats can fly without eyes, but NOT without

earsBats emit high frequency sound waves that bounce off objects

Can determine size, distance, direction, speed

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ECHOLOCATION

• Also used by some kinds of whales

Image from:

http://www.lth3.k12.il.us/tworivers/Pet%20Projects/steve/classification%20of%20animals%202/Page_39_Mammax.html

Page 12: Mammalian Adaptations

RUMEN

In cud chewers like cows, sheep, goats, giraffes

First chamber of stomach containing bacteria to digest plants

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CECUM

In NON cud chewers like horses, rabbits, rodents, elephants

Small pouch off small intestine containing bacteria to digest plants

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Human appendix is vestigial cecum

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PRIMATESLarger Brain

Grasping hand with fingernails instead of claws

2 forward facing eyesIncludes:•Gorillas•Chimps•Monkeys•Lemurs

Gorilla Image from:

http://www.lth3.k12.il.us/tworivers/Pet%20Projects/steve/classification%20of%20animals%202/Page_39_Mammax.html

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PRIMATES

Humans are primates too!

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PINNIPEDS• Carnivores

• streamlined body

• flipper limbed

Seals WalrusesSea lions

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UNGULATESMammals with Hooves

Artiodactyla Even number of toes Moose, bison, deer, elk, goats,

pigs, camels, sheep, cows

PerissodactylaOdd number of toesHorses, zebras, rhinos

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CETACEANSIncludes:

whales, dolphins,

porpoises

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PROBOSCIDEAProboscis:

Boneless trunked nose

Only 2 speciesAsian elephant

African elephant

Image from:

http://www.lth3.k12.il.us/tworivers/Pet%20Projects/steve/classification%20of%20animals%202/Page_39_Mammax.html

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CHIROPTERA

BATS

Only mammals that can fly


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