Class Mammalia By Mrs. Souza
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Transcript of Class Mammalia By Mrs. Souza
Class MammaliaBy Mrs. Souza
Mammil = milk fed
Characteristics
Warm-blooded Have hair 3 distinct ear bones Modified mammary glands
to provide milk to offspring
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Main Groups Subclass Eutheria
(placental mammals) Subclass Metatheria
(marsupials) Subclass Prototheria (egg
laying)
19 orders within the subclasses
Monotremes and Marsupials
Only 5 percent of all mammalian species are in the orders Monotremata and Marsupialia.
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Placental MammalsThe placenta is a
membrane providing nutrients and waste & gas exchange between the mother and developing young
Feeding All produce milk for young Consumers – eating a wide
variety of organisms (animals, plants, fungi)
Carnivores – species with O. Carnivora
Herbivores – species in O. Artiodactyla
Omnivores – species O. Primatia
Body Plan and Symmetry
Bilaterally symmetrical Warm-blooded Major organ systems to
circulate blood and oxygen (heart, brain, lungs, internal skeleton)
Modified appendages for their habitat
Respiration Lungs The lungs of
mammals have a spongy texture and are honeycombed with epithelium
Breathing is driven by the diaphragm
Response Central nervous system
with a brain Hearing is well-developed Sense through modified
hair (whiskers) Communicate through
sound
Movement Locomotion styles are diverse:
mammals may swim, run, bound, fly, glide, burrow, or climb as a means of moving throughout their environment.
Some mammals live in groups of tens, hundreds, thousands or more individuals. Other mammals are generally solitary except when mating or raising young.
Lifespan Smaller mammals live
short lives and larger mammals live longer lives.
Bats are an exception, live one or more decades
Range from 1 year to 70 years
Quiz Questions What characteristic separates
Class Mammalia into 3 Subclasses?
How do mammals gather oxygen and release carbon dioxide?
What are three characteristics that separate Class mammalia from other vertebrates?