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?