| The ____ are the two upper chambers of the heart. |
arteries |
| The superior (upper) and inferior (lower) ____ are large veins. |
atriums |
| Blood flows from the right ventrical to the ____ to the left atrium. |
chambers |
| The smallest veins are called ____. |
kidneys |
| Your heart has four ____ (two atriums and two ventricles). |
lungs |
| Your ____ filter blood plasma by separating it from waste. |
vena cavas |
| Blood travels from your heart to your legs through ____. |
ventricles |
| The ____ are the two thick-walled lower chambers of the heart. |
venules |
