We just learned about the Lymph Nodes.
Another part of the lymphatic system is Bone Marrow.
When we think about our bones, we think of them as hard solid.
But inside our bones is something called bone marrow.
This bone marrow is soft, and is mostly white with some yellow and red.
When we think about blood, we just think of it red liquid, but there are really two types of blood cells called red and white blood cells.
Marrow is where these blood cells in the body are made, and even though we think of the outside of our bones as solid there are really small arteries and veins there that bring the fresh blood cells out of the bone marrow to go to the rest of the body.
(from: wikipedia - bone marrow)
Kid Facts - Blast from the past: Cornea
