The immune system.
The immune system
closed circulatory system!! blood fluid is DISTINCT from the body cells
Cardiovascular
To make energy for their bodys, and to STAY ALIVE!!!
Circulatory system
yes
I believe the bodies transportion system is the cardiovascular system :)
Respiratory
Well... They build up a layer of fat which powers their bodys.
To make energy for their bodys, and to STAY ALIVE!!!
It protects the body by fighting sickness and defending it from foreign invaders, such as bacteria. micro organisms, viruses, and parasites
It protects the body from foreign substances and pathogenic organisms by producing the immune response. <a href="http://www.tedthomas.com/">tax deeds for sale</a>