artery anatomy, showing lumen

The lumen (pl. lumina) is the interior of a vessel within the body, such as the small central space in an artery or vein, or any of their relating vessels through which blood flows. Lumen may also refer to the inner membrane space of a chloroplast, Golgi apparatus or mitochondrion. On a larger scale, the interior of the gastrointestinal tract may also be referred to as its lumen, and likewise the pathways of the bronchi in the lungs. Image File history File links Download high resolution version (1024x733, 132 KB) Summary Anatomy overview of a human artery made for PhD project. ... Image File history File links Download high resolution version (1024x733, 132 KB) Summary Anatomy overview of a human artery made for PhD project. ... Section of an artery For other uses, see Artery (disambiguation). ... In the circulatory system, a vein is a blood vessel that carries blood toward the heart. ... Human blood smear: a - erythrocytes; b - neutrophil; c - eosinophil; d - lymphocyte. ... The inner membrane is a membrane (phospholipid bilayer) of an organelle that is within the outer membrane. ... The thylakoid lumen is the compartment in the chloroplast bounded by the thylakoid membrane. ... Diagram of the endomembrane system in a typical eukaryote cell Micrograph of Golgi apparatus, visible as a stack of semicircular black rings near the bottom. ... Electron micrograph of a mitochondrion showing its mitochondrial matrix and membranes In cell biology, a mitochondrion (plural mitochondria) (from Greek μιτος or mitos, thread + κουδριον or khondrion, granule) is a membrane-enclosed organelle, found in most eukaryotic cells. ... The gastrointestinal tract (GI tract), also called the digestive tract, alimentary canal, or gut, is the system of organs within multicellular animals that takes in food, digests it to extract energy and nutrients, and expels the remaining waste. ... A bronchus (plural bronchi, adjective bronchial) is a caliber of airways in the the respiratory tract that conducts air into the lungs. ... The heart and lungs (from an older edition of Grays Anatomy) The lung is an organ belonging to the respiratory system and interfacing to the circulatory system of air-breathing vertebrates. ...