Question

question 8 of 10
what is the difference between white and red blood cells?
a. red blood cells coagulate wounds; white blood cells defend against bacteria.
b. red blood cells hold oxygen; white blood cells hold carbon dioxide.
c. red blood cells are respiratory; white blood cells are circulatory.
d. red blood cells are in veins; white blood cells are in arteries.

Explanation:

Red blood cells are responsible for transporting oxygen. White blood cells are part of the immune - system and defend against bacteria and other pathogens. Platelets are the cells that coagulate wounds. Red blood cells don't hold carbon dioxide (that's a role of plasma and some red - cell mechanisms in a different context), both red and white blood cells are in the circulatory system and are present in both veins and arteries.

Answer:

No correct option provided. But if we must choose the 'least wrong' one, A has some truth as white blood cells defend against bacteria, though red blood cells don't coagulate wounds (platelets do).