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Taxonomy

Mammals













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Class Mammalia;
   -hair (protein)
   -mammary glands
   -endothermic
   -teeth
   -diaphragm
   -well developed brain
   -lungs, two way, two circuits: pulmonary and systemic
   -four chamber heart
   -well developed hormonal system
 
Order Placental: most mammals, uterus until developement is complete, half maternal and half embryonic.
 
Order Marsupial: uterus holdsembryo for first stage, have skin and hair, complete developement in pouch.
 
Order Monotremes: egg laying, platypus and spiny anteater
















Monotreme
monotreme.jpg

Marsupial
marsupial.jpg

mollusks and annelids

anthropoda

echinoderms and invertabrates

Subphylum Vertabrata

reptiles and birds