Ortega’s Mereology, Theory of Knowledge and Metaphysic as the Foundation of Julián Marías’ "Metaphysical Anthropology"

For a better understanding of Julián Marías’<em> Metaphysic Antropology</em>, it is recommendable going back to the Ortega’s mereology, epistemology and metaphysic, especially in order to clarify the meaning of “structure”, “system”, “organ” and “function”. The vital reason is personal project as the systematic openness to its circumstance, whose unitary, empirical and structural structure is “man”