The Blood and Vessels

Which component of blood carries oxygen?

• Red blood cells

• White blood cells

• Platelets

• Plasma

Which component of blood carries dissolved hormones and glucose?

• Red blood cells

• White blood cells

• Platelets

• Plasma

Which component of blood clots the blood to form scabs?

• Red blood cells

• White blood cells

• Platelets

• Plasma

Which component of blood defends against pathogens?

• Red blood cells

• White blood cells

• Platelets

• Plasma

Red blood cells do not have a _______ to make more space for haemoglobin and oxygen

White blood cells fight pathogens by making antitoxins, __________ and engulfing them.

________ have thick muscle walls to withstand high pressure.

_____ have valves to prevent backflow

capillaries have walls that are only 1 cell thick for maximum _________