Is blood a cell, a tissue or an organ?

• a cell

• a tissue

• an organ

What are the components of blood?

• red blood cell

• white blood cells

• platelets

• plasma

• all of these

Which component of blood is the arrow pointing to?

• a red blood cell

• a white blood cell

• a platelet

• plasma

What shape are red blood cells?

• spherical

• flat discs

• biconcave discs

• square discs

What is the function of red blood cells?

• to help to defend against pathogens

• to transport oxygen

• to help blood to clot

• to transport dissolved substances

Which component of blood is the arrow pointing to?

• a red blood cell

• a white blood cell

• a platelet

• plasma

What is the function of white blood cells?

• to transport oxygen

• to help to defend against pathogens

• to transport dissolved substances

• to help blood to clot

Which component of blood is the arrow pointing to?

• a platelet

• a white blood cell

• a red blood cell

• plasma

What is the function of platelets?

• to transport oxygen

• to transport dissolved substances

• to help blood clot

• to help defend against pathogens

Which component of blood is the arrow pointing to?

• a red blood cell

• a white blood cell

• plasma

• a platelet