Circulatory System

The most important organ in the circulatory system.

• vein

• aorta

• heart

• arteries

These blood vessels carry oxygen and nutrients to the body.

• Arteries

• Veins

• capillaries

• tubes

Prevents the blood from going backward.

• atrium

• ventricle

• valves

• homeostasis

Causes the "lub-dub" sound in the heart.

• arteries

• veins

• chambers

• valves

Upper part of the heart on both sides.

• ventricle

• aorta

• atrium

• platelets

Bacteria or viruses fought by white blood cells.

• pathogens

• hormones

• plasma

• hemoglobin

Gives blood it's red color.

• antibodies

• marrow

• veins

• hemoglobin

Chemicals that destroy pathogens (viruses).

• valves

• antibodies

• hormones

• nutrients

Tiny pieces of larger cells in bone marrow.

• hemoglobin

• sugar

• platelets

• protein

This cell carries oxygen to the body.

• veins

• platelets

• white blood cell

• red blood cell