what is the definition of a human organ
Organ (anatomy) Organs are collections of tissues with a similar function. Plant and animal life relies on many organs that coexist in organ systems.[2]
Spleen The spleen is an organ found in virtually all vertebrates. Similar in structure to a large lymph node, it acts primarily as a blood filter. The word spleen comes from Ancient Greek σπλήν (splḗn).[1]