What makes red and white blood cells?

Answer 1

Red blood cells contain iron which makes them reddish. White blood cells contain lysosomes which are used to breakdown foreign invaders, such as pathogens in the blood stream.

Answer 2

Red blood cells are made in the bone marrow through a process called erythropoiesis, where stem cells mature into red blood cells. White blood cells are also produced in the bone marrow through a process called leukopoiesis. Both types of cells play key roles in the body's immune system and oxygen transport.

Answer 3

The bone marrow in all of your bones.