Circulatory System Vocabulary

System that transports materials throughout the body is called...

• digestive system

• circulatory system

• respiratory system

Maintaining internal stability is called...

• respiration

• homeolation

• homeostasis

The main pump (strong muscle about the size of a closed fist) of the circulatory system is called...

• heart

• liver

• lungs

These prevent the backflow of blood in the heart and veins...

• capillaries

• arteries

• valves

Thick-walled blood vessels that carry oxygen-rich blood away from the heart are called...

• arteries

• veins

• capillaries

Thin-walled blood vessels that carry deoxygenated blood back to the heart are called...

• arteries

• veins

• capillaries

Very thin-walled blood vessels that connect arteries and veins are called...

• arteries

• veins

• capillaries

The yellowish liquid part of blood is called...

• plasma

• red blood cells

• white blood cells

• platelets

Disc-shaped cells that carry oxygen within the blood are called...

• plasma

• red blood cells

• white blood cells

• platelets

Large cells within the blood that fight bacteria and other pathogens are called...

• plasma

• red blood cells

• white blood cells

• platelets