MAMMALS RESOURCES 3 VIDEO CLIPS MARSUPIALS RAT DISSECTION TEXT Chap 808-829.
Eutherians and Marsupials
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Transcript of Eutherians and Marsupials
Phylum Chordata:EutheriansMarsupials
Phylum: Chordata(Eutherians)
CHARACTERISTICS..placental mammals + all extinct mammals that are more
closely related to living placentals (such as humans)- mostly rodents and bats.
covered with hair, have an extra brain layer (cortex). endothermic ("warm-blooded"):body temperature
slightly higher than marsupials and monotremes.live young-nourished before birth in the mother's
uterus through placenta. –complete embryonic development within mother (vivipary).
lack epipubic bones
Eutheria’s Habitat
found on all continents, in the air, and in the seas
EXAMPLES
Phylum: Chordata(Marsupials)
Unique characteristics: Have pouches(marsupium)Have nipples that produce milkMarsupials do not nourish their embryos with a placenta.Give birth to live youngHigher metabolic rate
Female marsupials have a double reproductive tract.Uterus and vagina are biphidEpipubic bones (both sexes; whether or not they have pouches)
Marsupial’s HabitatLiving primarily in the Southern Hemisphere.
Marsupials are mostly (but not solely) found in Australia. They inhabit a variety of biomes, including rainforest, bushland, alpine regions, grassland and desert.
They are not found in marine habitats.
Examples of Marsupials
Kangaroos
Opossum
Koalas
Tasmanian Devil
SIMILARITIES
Eutherians Marsupials
Vertebrates, warm-bloodedhave fur, skin or hairbreathe through lungs (not gills)the young feed on mother's milk
DIFFERENCES
Females having one uterus, one vagina and one cervix
Female have two uteri, two vaginas and two cervices.
have an extra brain layer (cortex)
small and narrow braincase (houses a relatively small and simple brain)
fetus inside the uterus often have pouches to carry their youngs
embryonic development in the uterus(young nourished by placenta)
young are born undeveloped -continue most of their growth and development whilst in the mother's pouch
SUMMARY
Fun facts about Eutherian
exist in many different environments, mainly because there are so many different species!the dominant species of mammal, with more species than marsupials or monotremes.Placental Mammals were widespread in North America during the Ice AgeHumans and regular animals in human life are placental mammals