bone marrow <span>contains hematopoietic stem cells, which give rise to the three classes of blood cells that are found in the circulation: white blood cells (leukocytes), red blood cells (erythrocytes), and platelets (thrombocytes)</span>
it wont let me post it so i'll comment on the question box
Functionalism- <span>19th-century school of psychology influenced by Darwin's theory of natural selection that argued it was better to look at why the mind works the way it does than to describe its parts. Also used introspection.</span>