Red blood cells are made by the marrow.
No, they do not.
If by the spongy bone you mean bone marrow, it makes blood cells. There are three types of blood cells; red blood cells, white blood cells, and platelets.
Bone Marrow is created in your bones when you are born. This is found in the centre of the bone.
bone cells, red bone marrow, yellow bone marrow, and connective tissue.
Marrow (I think) :)