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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. MARSUPIALS Premature babies develop in pouch. - PowerPoint PPT Presentation
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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
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
MARSUPIALS
Only North American Marsupial
• Oppossum
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
Specialized teeth vary with diet
Grass eaters have different teeth than carnivores
http://animaldiversity.ummzurich.edu/anat/tooth_introduction.html
INCISORS- cut
CANINES- grip, puncture, tear
PREMOLARS- shread, cut, grind
MOLARS- grind, crushImage from: http://antro.palomar.edu/animal/default.htm
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
EcholocationBats can fly without eyes, but NOT without
earsBats emit high frequency sound waves that bounce off objects
Can determine size, distance, direction, speed
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
RUMEN
In cud chewers like cows, sheep, goats, giraffes
First chamber of stomach containing bacteria to digest plants
CECUM
In NON cud chewers like horses, rabbits, rodents, elephants
Small pouch off small intestine containing bacteria to digest plants
Human appendix is vestigial cecum
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
PRIMATES
Humans are primates too!
PINNIPEDS• Carnivores
• streamlined body
• flipper limbed
Seals WalrusesSea lions
UNGULATESMammals with Hooves
Artiodactyla Even number of toes Moose, bison, deer, elk, goats,
pigs, camels, sheep, cows
PerissodactylaOdd number of toesHorses, zebras, rhinos
CETACEANSIncludes:
whales, dolphins,
porpoises
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
CHIROPTERA
BATS
Only mammals that can fly