Term Name: smooth muscle tissue
Synonyms: involuntary muscle, non-striated muscle, smooth muscle, textus muscularis levis; textus muscularis nonstriatus, textus muscularis nonstriatus, visceral muscle, visceral muscle tissue
Definition: Muscle tissue which is unstriated, composed primarily of smooth muscle fibers surrounded by a reticulum of collagen and elastic fibers. Smooth muscle differs from striated muscle in the much higher actin/myosin ratio, the absence of conspicuous sarcomeres and the ability to contract to a much smaller fraction of its resting length[GO].
Ontology: Cell Ontology [UBERON:0001135]

Relationships
has parts: smooth muscle endomysium
is a type of: muscle tissue
has subtype: alveolar smooth muscle anal region smooth muscle aorta smooth muscle tissue arrector muscle of hair arterial system smooth muscle arteriole smooth muscle artery smooth muscle tissue blood vessel smooth muscle bronchus smooth muscle clitoral smooth muscle enteric circular muscle epididymis smooth muscle gall bladder smooth muscle gastrointestinal system smooth muscle gizzard smooth muscle hepatic duct smooth muscle inferior tarsal muscle intestine smooth muscle iris smooth muscle kidney pelvis smooth muscle large intestine smooth muscle lower respiratory tract smooth muscle lymphatic vessel smooth muscle main bronchus smooth muscle mammary gland smooth muscle mesonephric smooth muscle tissue metanephric smooth muscle tissue muscularis mucosa outflow tract smooth muscle oviduct smooth muscle perineal body smooth muscle muscle tissue prostate gland smooth muscle rectum smooth muscle tissue respiratory system arterial smooth muscle respiratory system blood vessel smooth muscle respiratory system lymphatic vessel smooth muscle respiratory system smooth muscle respiratory system venous smooth muscle small intestine smooth muscle smooth muscle layer in fatty layer of subcutaneous tissue smooth muscle of esophagus smooth muscle of eye smooth muscle of trachea smooth muscle tissue layer of ejaculatory duct smooth muscle tissue of bronchiole smooth muscle tissue of respiratory bronchiole smooth muscle tissue of terminal bronchiole spleen smooth muscle stomach smooth muscle superior tarsal muscle umbilical smooth muscle ureter smooth muscle urethra smooth muscle layer urinary bladder neck smooth muscle urinary bladder smooth muscle urinary bladder trigone smooth muscle vagina smooth muscle venous system smooth muscle
disjoint_from: striated muscle tissue