Answer: board-certified "pathologist" (physician).
_________________________________________________
Answer:
Some cells are different shapes as they have different ways of attempting to pass through the immune system they are different sizes as some of them want to make sure that the white blood cells cannot swallow them as easily at that point antitoxins are released to break them down
Explanation:
She noticed a pressing human need, this is why she formed the American Red Cross.
a. digestive and excretory systems.
