Organ (biology)
COLLECTION OF TISSUES WITH SIMILAR FUNCTIONS
Viscus; Internal organ; Hollow organ; Visceral organ; Organs; Visceral; Vital organ; Internal organs; Organic system; Viscera; Vicera; Vital organs; Plant organs; Innervation of viscera; Innervation of the viscera; Viscera innervation; Visceral innervation; Pelvic viscera; Thoracic viscera; Visceras; Thoracic visceras; Plant organ; Abdominal viscus; Visceral organs; Organomics; Organs (anatomy); Organ (anatomy); Solid organ
In biology, an organ is a collection of tissues joined in a structural unit to serve a common function. In the hierarchy of life, an organ lies between tissue and an organ system.