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Nervous System

-central nervous system that includes the brain and spinal cord
-system obtains information about internal and external environment
-analyzes response needed for the environment
-stores information for learning
-coordinates movements to muscles

Unique Info

-weigh up to 85 or 90 pounds
-grow up to 4 feet tall
-life span is about 20 years
-very social animals that hunt together
-sleep standing up
-can become sunburned if they live too close to the equator
-use the sun to know when to be hunting and to help migration

Integumentary System

-thick layer of down, outer feathers, and blubber used as insulation
-body oil covers surface of the body and keeps it dry at all times
-chicks covered in wooly down
-feathers are smaller, stiffer, and narrow compared to flying birds
-feathers made of keratin that is water repellent also

Video

ttp://www.youtube.com/watch?v=_xrjzq1BOv8

Respiratory System

-lungs help avoid depressions sickness when diving
-breathe quickly at surface, not disturbing the forward motion
-pant in heat

Digestive

-they dive for an average of six minutes to forage
-blow air bubbles in cracks in the ice to flush out hiding fish
-males are able to store undigested food in their stomachs while incubating their egg
-digestive system alike to other birds, including organs such as a crop, gizzard, pancreas, and intestines, excreting through the cloaca