Circulation!
Moving things around the body?
How do simple creatures do this?
How do we?
Do plants have hearts and blood?
What is in the blood?
Are you ready for the test?
How do simple creatures circulate nutrients and wastes?
What are the three main parts of a complex circulatory system?
What is our pump?
What are its chambers?
What are our tubes?
Contrast arteries and veins.
What is in our blood?
Briefly describe some disorders of the circulatory system.