Heart and circulation vocabulary

A chamber that receives blood that is returning to the heart.

• Atrium

• Ventricle

• Valve

• Pacemaker

One of the two large muscular chambers that pump the blood out of the heart.  

• Atrium

• Ventricle

• Valve

• Pacemaker

Flap of tissue that prevents blood flowing backward into a blood vessel or heart chamber.

• Atrium

• Ventricle

• Valve

• Pacemaker

Collection of cells that stimulate the pumping action of the heart.

• Atrium

• Ventricle

• Valve

• Pacemaker

Collection of blood vessels that carries blood between the lungs and the heart.

• Pulmonary circulation

• Ventricle

• Valve

• Systemic circulation

Collection of blood vessels that carries blood between the heart and the rest of the body, except for the lungs.

• Pulmonary circulation

• Ventricle

• Valve

• Systemic circulation