Circulatory System

Humans have a __________ circulatory system, meaning that blood is pumped through a series of veins and arteries.

The organ which is responsible for "pumping" blood to all of the regions of the body is known as what?

The protective sac in which the heart is found is known as what?

The human heart is found in the _____________ cavity in the human body.

The muscular tissue of your heart, known as _____________, is what contracts to pump blood through the circulatory system.

The human heart is a _____________________ muscle, meaning that it operates without conscious thought.

The right and left sides of the heart are separated by the _______________, which prevents the oxygen rich and oxygen poor blood from mixing.

The upper chambers of the heart receives the incoming blood, and are known as what?

The lower chambers of the heart which pump blood out of the heart, are known as what?

Deoxygenated blood passes from the ___________ into the right ventricle, and goes to the lungs.