lòrgan

l'òrgan is a Catalan noun that can refer to the organ in biology or to the pipe organ, depending on context. In biology, an organ is a structural unit made up of multiple tissues that together perform a specific function within an organism. Organs are organized into organ systems such as circulatory, digestive, respiratory, nervous, endocrine, musculoskeletal, and excretory systems. Most organs consist of parenchymal tissue, which carries out the organ’s primary tasks, and stromal or supporting tissue that provides structure, blood supply, and scaffolding. They rely on networks of blood vessels, nerves, and lymphatics to coordinate function.

In animals, examples include the heart (pumping blood), liver (metabolic processing), lungs (gas exchange), kidneys (filtration and homeostasis), brain (control and coordination), and stomach (digestion). In plants, organs include roots (absorption and storage), stems (support and transport), leaves (photosynthesis), and reproductive structures such as flowers. The formation and specialization of organs occur during development; in animals through organogenesis, in plants from meristems. The number and presence of organs vary by species, and some structures can be vestigial or functionally reduced.

In music, l'òrgan refers to the pipe organ, a keyboard instrument that produces sound by forcing air through pipes or electronically generating tone. It features multiple ranks of pipes, a keyboard console, stops to control timbre, and a blower or bellows to supply air. Pipe organs are common in churches and concert venues.

See also: Organ (biology); Pipe organ; Organ system.