This article contains a list of organs in the human body. It is widely believed that there are 78 organs (the number increases if each bone and muscle is also included); however, there is no universal standard definition of what constitutes an organ, and some tissue groups' status as one is debated. Since there is no single standard definition of what constitutes an organ, the number of organs vary depending on how one defines an organ. For example, this list contains more than 78 organs (about ~91).
The list below is not comprehensive, as it is still not clear which definition of an organ is used for all the organs in the list.
Organ related tables
+ Explanation of the levels in the human body; defines the column labels in the next table. Level Definition Organ systems A biological system consisting of a group of organs that work together to perform one or more functions. Organ sub-systems A biological system consisting of a group of organs that work together to perform just one function. Body parts Somewhat arbitrarily defined sections on the body based on what humans have historically thought was one thing with a primary function. Organs A collection of tissues that structurally form a functional unit specialized to perform a particular function (some of the organs in this list perform multiple functions). Organ parts The different sections that medical professionals tend to split a given organ into for medical purposes. Tissue Consists of a group of structurally and functionally similar cells as well as their intercellular material. Cells Organelles enclosed in a membrane.
+ List of human organs, their parts, and the parts and systems they belong to. System Subsystem Body parts Organs Organ parts Musculoskeletal Skeletal Skeleton BonesList of bones of the human skeleton Joints Ligaments Muscular Muscles List of skeletal muscles of the human body TendonsTendon#List of Tendons Digestive Mouth Teeth Tongue Lips Salivary glands Parotid glands Submandibular glands Sublingual glands Pharynx Esophagus Stomach Small intestine Duodenum Jejunum Ileum Large intestine Cecum Ascending colon Transverse colon Descending colon Sigmoid colon Rectum Anal canal Liver Gallbladder Mesentery Pancreas Respiratory Nasal cavity Pharynx Larynx Trachea Bronchi Bronchioles and smaller air passages Lungs Muscles of breathing Urinary Kidneys Ureter Bladder Urethra Reproductive Female Ovaries Fallopian tubes Uterus Cervix Placenta Vulva (including clitoris) Vagina Male Testicles Epididymides Vasa deferentia Seminal vesicles Prostate Bulbourethral glands Penis Scrotum Endocrine Pituitary gland Pineal gland Thyroid gland Parathyroid glands Adrenal glands Pancreas Circulatory Circulatory Heart ArteriesList of arteries of the human body VeinsList of veins of the human body Capillaries Lymphatic Lymphatic vessel Lymph node Bone marrow Thymus Spleen Gut-associated lymphoid tissue Tonsils Interstitium Nervous Central nervous Brain Cerebral hemispheres Thalamus Hypothalamus Midbrain Cerebellum Pons Medulla oblongata The spinal cordList of nerves of the human body Choroid plexus Peripheral nervous Nerves Cranial nervesList of nerves of the human body Spinal nervesList of nerves of the human body Ganglia Enteric nervous system Sensory organs Head Eye Ear Nose Tongue Integumentary Mammary glands Skin Hair Nail
See also
Terminologia Anatomica List of systems of the human body List of distinct cell types in the adult human body List of skeletal muscles of the human body Gene Wiki List of organ transplant donors and recipients List of bones of the human skeleton
References