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Finesse

Terms in this set (30)

All mammals have ..
hair; keratin
Completely divided heart
4 chambers, 2 ventricles
Synapsids
Gave rise to mammals & their extinct relatives
Therapsids
Gave rise to mammals
Early Mammals co-existed...
With dinosaurs for more than 150mill years
Monotremes
Oviparous
Marsupials
Viviparous
Placental mammals
Fetus develops in placenta
Mammal circulation (heart)
2 atria & 2 ventricles
Diaphram
Muscle of respiration that contacts & enlarges thorax
Ruminants (regurgitate)
Cows, sheep, goat, giraffes, deer
Cecum animals
(DONT regurgitate)
Horses, zebras, rodents, rabbits, elephants
Monotremes do what?
Lay one or two eggs
Placenta provides
Nourishment
Placenta material movement
Nutrients & oxygen from mother's blood to embryo, carbon dioxide & waste from embryo to mother's blood
Order Monotremata
Platypus & 2 echidna
Order Xenarthra
Anteaters, armadillos, sloths
Order Carnivora
Dogs, cats, raccoons, bears, hyenas, otters, seals, sea lions
Order Cetacea (2)
-Whales & dolphins
-fish shaped bodies with flippers, lack hind limbs, have broad flat tails for swimming
Sirenia
Manatees & dugongs
Anthropoids
Earliest mammal lineage
Great apes
Orangutans, gorillas, chimps, humans
Modern humans have (3)
-bowl shaped pelvis to support organs during upright walking
-spine is S-shaped for posture
-toes are aligned & shorter
Hominids (2)
-Include humans & extinct human-like anthropoid species
-bipedalism
Australopithecine (3)
-Lucy
-3.2 m.y.a
-brain size of chimp, bipedalism
H. Habilis
Handy human with tools after Lucy
H. Erectus
Upright human traveled out of Africa
H. Neanderthalensis
Heavy bones with same brain size as us (coulda interacted with h. Sapiens)
H. Sapiens
160,000 years ago, same body & brain size
Innate behavior
Instincts & fully functional form at birth
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