# List of organs of the human body

This article contains a list of organs in the human body. It is widely believed that there are 79 organs (this number goes up if you count each bone and muscle as an organ on their own, which is becoming a more common practice); 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 79 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 | Organells 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 | Musculoskeletal | Human skeleton | Human skeleton | List of bones of the human skeleton |
| Musculoskeletal | Musculoskeletal | Joints | Joints | |
| Musculoskeletal | Musculoskeletal | Ligaments | Ligaments | |
| Musculoskeletal | Musculoskeletal | Muscular system | Muscles | List of skeletal muscles of the human body(sub: Muscles of breathing) |
| Musculoskeletal | Musculoskeletal | Tendons | Tendons | Tendon#List of Tendons |
| Digestive | Digestive | Mouth | Teeth | |
| Digestive | Digestive | Mouth | Tongue | |
| Digestive | Digestive | Mouth | Lips | |
| Digestive | Digestive | Salivary glands | Parotid glands | |
| Digestive | Digestive | Salivary glands | Submandibular glands | |
| Digestive | Digestive | Salivary glands | Sublingual glands | |
| Digestive | Digestive | Pharynx | Pharynx | |
| Digestive | Digestive | Esophagus | Esophagus | |
| Digestive | Digestive | Stomach | Stomach | |
| Digestive | Digestive | Small intestine | Duodenum | |
| Digestive | Digestive | Small intestine | Jejunum | |
| Digestive | Digestive | Small intestine | Ileum | |
| Digestive | Digestive | Large intestine | Cecum | |
| Digestive | Digestive | Large intestine | Ascending colon | |
| Digestive | Digestive | Large intestine | Transverse colon | |
| Digestive | Digestive | Large intestine | Descending colon | |
| Digestive | Digestive | Large intestine | Sigmoid colon | |
| Digestive | Digestive | Rectum | Rectum | |
| Digestive | Digestive | Liver | Liver | |
| Digestive | Digestive | Gallbladder | Gallbladder | |
| Digestive | Digestive | Mesentery | Mesentery | |
| Digestive | Digestive | Pancreas | Pancreas | |
| Digestive | Digestive | Anal canal | Anal canal | |
| Respiratory | Respiratory | Nasal cavity | Nasal cavity | |
| Respiratory | Respiratory | Pharynx | Pharynx | |
| Respiratory | Respiratory | Larynx | Larynx | |
| Respiratory | Respiratory | Trachea | Trachea | |
| Respiratory | Respiratory | Bronchi | Bronchi | |
| Respiratory | Respiratory | Bronchioles and smaller air passages | Bronchioles and smaller air passages | |
| Respiratory | Respiratory | Lungs | Lungs | |
| Respiratory | Respiratory | Muscles of breathing | Muscles of breathing | |
| Urinary | Urinary | Kidneys | Kidneys | |
| Urinary | Urinary | Ureter | Ureter | |
| Urinary | Urinary | Bladder | Bladder | |
| Urinary | Urinary | Urethra | Urethra | |
| Reproductive | Female | Ovaries | Ovaries | |
| Reproductive | Female | Fallopian tubes | Fallopian tubes | |
| Reproductive | Female | Uterus | Uterus | |
| Reproductive | Female | Cervix | Cervix | |
| Reproductive | Female | Placenta | Placenta | |
| Reproductive | Female | Vulva | Vulva (including clitoris) | |
| Reproductive | Female | Vagina | Vagina | |
| Reproductive | Male | Testicles | Testicles | |
| Reproductive | Male | Epididymides | Epididymides | |
| Reproductive | Male | Vasa deferentia | Vasa deferentia | |
| Reproductive | Male | Seminal vesicles | Seminal vesicles | |
| Reproductive | Male | Prostate | Prostate | |
| Reproductive | Male | Bulbourethral glands | Bulbourethral glands | |
| Reproductive | Male | Penis | Penis | |
| Reproductive | Male | Scrotum | Scrotum | |
| Endocrine | Endocrine | Pituitary gland | Pituitary gland | |
| Endocrine | Endocrine | Pineal gland | Pineal gland | |
| Endocrine | Endocrine | Thyroid gland | Thyroid gland | |
| Endocrine | Endocrine | Parathyroid glands | Parathyroid glands | |
| Endocrine | Endocrine | Adrenal glands | Adrenal glands | |
| Endocrine | Endocrine | Pancreas | Pancreas | |
| Circulatory | Circulatory | Heart | Heart | |
| Circulatory | Circulatory | Arteries | Arteries | List of arteries of the human body |
| Circulatory | Circulatory | Veins | Veins | List of veins of the human body |
| Circulatory | Circulatory | Capillaries | Capillaries | |
| Circulatory | Lymphatic | Lymphatic vessel | Lymphatic vessel | |
| Circulatory | Lymphatic | Lymph node | Lymph node | |
| Circulatory | Lymphatic | Bone marrow | Bone marrow | |
| Circulatory | Lymphatic | Thymus | Thymus | |
| Circulatory | Lymphatic | Spleen | Spleen | |
| Circulatory | Lymphatic | Gut-associated lymphoid tissue | Tonsils | |
| Circulatory | Lymphatic | Interstitium | Interstitium | |
| Nervous | (Brain +) | Brain | Cerebral hemispheres | |
| Nervous | (Brain +) | Brain | Thalamus | |
| Nervous | (Brain +) | Brain | Hypothalamus | |
| Nervous | (Brain +) | Brain | Midbrain | |
| Nervous | (Brain +) | Brain | Cerebellum | |
| Nervous | (Brain +) | Brain | Pons | |
| Nervous | (Brain +) | Brain | Medulla oblongata | |
| Nervous | (Brain +) | The spinal cord | The spinal cord | List of nerves of the human body |
| Nervous | (Brain +) | Choroid plexus | Choroid plexus | |
| Nervous | Peripheral nervous | Nerves | Cranial nerves | List of nerves of the human body |
| Nervous | Peripheral nervous | Nerves | Spinal nerves | List of nerves of the human body |
| Nervous | Peripheral nervous | Nerves | Ganglia | |
| Nervous | Peripheral nervous | Nerves | Enteric nervous system | |
| Nervous | Sensory organs | Head | Eye | |
| Nervous | Sensory organs | Head | Ear | |
| Nervous | Sensory organs | Head | Nose | |
| Nervous | Sensory organs | Head | Tongue | |
| Integumentary | Integumentary | Mammary glands | Mammary glands | |
| Integumentary | Integumentary | Skin | Skin | |