Jump Start• Turn in your project

• On a piece of paper, answer the following:

– How many chambers does a bird heart have?– In a bird, where is the food stored before it enters

the stomach?– Birds are considered ectothermic or endothermic?

MammalsClass Mammalia

Characteristics

• Integumentary– hair, 2 pair of appendages, 5 digits, larynx

with vocal cords, have a highly developed immune system to recognize and destroy pathogens

Characteristics

• Skeletal/Muscular– 7 cervical vertebrae; Variety of limb

adaptions Can run, walk, climb, burrow, fly, swim, leap

Characteristics• Circulatory

– 4 chambered heart, 2 separate loops, complete separation of oxygen rich/oxygen poor blood

• Reproductive– Dioecious – different sexes, internal

fertilization, viviparous – live births, placenta, mammary glands

P2 = slate

• What are at least two distinguishing features of mammals?

Characteristics• Nervous

– Highly developed cerebrum/cerebellum, & senses to detect and respond to stimuli. Endocrine system to regulate body activities by hormones

• Respiratory– Diaphragm, lungs with alveoli instead of air

sacs, lungs are controlled by two sets of muscles for inhalation and exhalation

Characteristics• Digestive

– Complex teeth, herbivores (many have specialized digestive organs to break down plant matter), carnivores, omnivores

• Excretory– Highly developed kidneys extract urea and

help excrete or retain water as needed

Characteristics

• Body Temperature– Endothermic, may also have sweat glands

• Habitat– Land and water

P2 = Turn to your partner

• Describe how to distinguish between a herbivore and a carnivore by looking at an animals teeth.

Groups of Mammals

• Monotremes – egg laying, have cloaca (platypus)

• Marsupials – immature young develop in external pouch (kangaroo, koala)

• Placentals – embryo develop longer inside mother (human, dog, elephant)