1. MAMMALS read chapters 2 and 4.

2. Characteristics Elevated metabolic rate
External hair / fur covering body
Lactation
mammary glands produce milk to feed young
Increasing locomotor efficiency
limbs carried directly beneath the body
Increased brain size
Increased respiratory efficiency
costal ventilation replaced by muscular diaphragm

3. Vertebrate Lungs
Respiration

5. Breathing

6. Characteristics Increasing feeding efficiency
Large complex jaw muscles with improved mechanics
Heterodont dentition
teeth vary in size, shape and function
Complex (rotary) chewing
Diphyodont dentition
only 2 sets of teeth

10. Systematics Three major groups Monotremata egg laying mammals
oviparous
duckbilled platypus, spiny anteater
primitive skull and limb girdles
mammary glands
young lick milk from mother’s fur

17. Systematics Marsupialia pouched mammals Have placenta
Young born at early stage of development
climb into mother’s pouch
attach to a nipple to complete development
Kangaroo Birth

23. Systematics Eutheria viviparous Placenta mammals
Elaborate placenta for developing young in utero

31. Oh My!!

33. Systems Circulatory 4 chambered heart
one side sends oxygen poor blood to lungs and back to heart
pulmonary circuit
other side send oxygen rich blood from heart to rest of body
systemic circuit
Blood Circulation
Happy Days

36. Systems Excretion kidneys control composition of all body fluids
have the ability to excrete excess liquid or retain it
can retain salts, sugars and other compounds body cannot afford to lose