Circulatory System

The group of organs, consisting of the heart and blood vessels, that circulates blood through the body.

• Respiratory System

• Circulatory System

• Lymphatic System

• Digestive System

A fluid in the body that delivers oxygen and other materials to cells and removes carbon dioxide and other wastes.

• mucus

• chyme

• blood

• lymph

A type of blood cell that picks up oxygen in the lungs and delivers it to cells throughout the body.

• white blood cell

• platelets

• lymph nodes

• red blood cell

A blood vessel with strong walls that carries blood AWAY from the heart.

• artery

• vein

• capillary

• neuron

A blood vessel that carries blood back to the heart.

• artery

• vein

• capillary

• villi

A narrow blood vessel that connects arteries and veins, and where material can move in and out of bloodstream.

• artery

• vein

• capillary

• alveoli

A type of blood cell that helps the body fight pathogens (things that can cause diseases).

• red blood cell

• platelets

• septum

• white blood cell

Cell fragments that help the body form blood clots that stop bleeding in blood vessels.

• platelets

• red blood cells

• white blood cells

• plasma

The upper chambers of the heart that receive blood entering the heart.

• septum

• atrium

• ventricles

• valves

The lower chambers of the heart that pump blood out of the heart.

• valves

• atrium

• ventricles

• aorta