Mammals

Chimpanzee Gray Wolf

Beluga Whale Prairie Dog

Indo-Chinese Tiger

Bigfoot

Hozilla

Basic Characteristics• Endothermic

(pant/sweat/shiver)• Haira. Unique to mammalsb. Insulation, waterproofing,

communication, camouflage, protection.

• Nurse young: mammary glands (what are glands?)

• Modified Limbs: for gathering food

• Opposable thumbs to grasp.

Body systems Nervous: highly sophisticated intelligence;

sense organs and brain. Circulatory: four-chambered heart; high

oxygen supply for energy. Respiratory: lungs with a diaphragm (muscle

to expand and contract chest) Digestive: Teeth types help distinguish food

sourcesa. Incisors (grasping, holding, chiseling)b. Canines (puncture/tear)c. Molars (grind/crush)

Groups of Mammals

Placental Mammalsa. Carries young inside body until

development is almost completeb. Protects offspring from predators and

environmentc. Nourishment provided by placentad. Gestation (time of pregnancy) variese. Largest sub-class (approx. 95%)

Group #2: Marsupials

• Pouched Mammals/Marsupials

a. Short period of development in the body of mother, followed by longer period inside a pouch outside the mother’s body.

b. Majority found in Australiac. Success rate not as high as placental

http://www.google.com/url?sa=i&rct=j&q=kangaroo+birth&source=images&cd=&cad=rja&docid=fV4sKufKLEOb_M&tbnid=1TeDbjLX3Y-4AM:&ved=0CAUQjRw&url=http%3A%2F%2Faso.gov.au%2Ftitles%2Fdocumentaries%2Fbirth-of-the-red-kangaroo%2F&ei=frQvUZOZONS62gW-voCoBw&bvm=bv.43148975,d.aWM&psig=AFQjCNH5iLjpRvzLrZnMpWkUVEvv6twn_A&ust=1362167280639539

Monotremes• Egg-laying mammals• Reproduction takes place through the

presence of laying eggs• Only three species are monotremes:a. Duck-billed platypusb. Two-types of “spiny anteaters”c. Found in Australia and New Guinea