The heart is approximately the size of your ____ . It beats around ____ times a day. Pumps ____ blood to the lungs via the ____ arteries. The oxygenated blood then enters the left ____ is pumped through the ____ to the body. Contraction of the heart is called ____ . Relaxation of the heart muscles is called ____ .

Leaderboard

Visual style

Options

Switch template

Continue editing: ?