When a person suffers from anaemia there are not enough red blood cells to supply the body with the oxygen it needs. Leukemia is a kind of cancer of the bone marrow, in which not enough or abnormal white blood cells are produced. Without white blood cells diseases can enter your body without being controlled.

When your body does not have enough platelets blood cannot clot well. Even small injuries can lead to a loss of blood because bleeding doesn't stop.



Image (modified) : Mikael Häggström, Public domain, via Wikimedia Commons