Front

To pump and circulate blood is the work of which organ?

Back

Heart

Front

Circulatory system's closest partner?

Back

Respiratory

Front

Valves in the heart?

Back

4

Front

Circulatory System components: ____________ and ____________.

Back

Pulmonary and Systemic

Front

Pulmonary system blood circulation:

Back

From heart to lungs and back.

Front

The _______________ are where oxygen and nutrients are picked up by blood.

Back

lungs

Front

Main artery of the heart carrying oxygenated blood to the body (except lungs):

Back

aorta

Front

O2 is the symbol for

Back

2 oxygen atoms

Front

CO2 is the symbol for _____________.

Back

1 carbon and 2 oxygen atoms

Front

Circulatory system delivers _________ and nutrients to cells, carries ___________ and waste to lungs.

Back

oxygen and carbon dioxide