System of tubes where blood flows

• plasma
• heart
• blood vessels
• artery

What is the function of veins?

• connect to capillaries
• carry blood to the heart
• carry blood away from the heart
• connect to the lungs

A component of blood that helps in blood clotting.

• plasma
• RBC
• WBC
• platelet

A component of blood that carries oxygen from the lungs.

• plasma
• RBC
• WBC
• platelet

A component of blood that carries glucose and other substances to the body's cells

• plasma
• RBC
• WBC
• platelet

A blood component that makes antibodies and fights pathogens.

• WBC

• RBC

• platelet

• plasma

What is the function of valves?

• destroy microorganisms
• carries oxygen
• carries blood to the heart
• ensures blood flow in only one direction

Carries oxygenated blood from the heart

• artery
• capillaries
• veins
• aorta

which of the following is true about the heart?

• it can only contract
• it is made of muscle
• the lower chambers are called atrium
• it beats about 30 times in a minute

how many chambers does the heart have?

• 1
• 2
• 3
• 4