What Are the 78 Organs of the Human Body?

Medically Reviewed on 3/12/2021

An organ is a collection of tissues that function in a particular manner. The tissue is connected and constructed as a unit to serve a common function. All organs of the body work in sync to form about a dozen organ systems.
An organ is a collection of tissues that function in a particular manner. The tissue is connected and constructed as a unit to serve a common function. All organs of the body work in sync to form about a dozen organ systems.

An organ is a collection of tissues that function in a particular manner. The tissue is connected and constructed as a unit to serve a common function. All organs of the body work in sync to form about a dozen organ systems. Below is the list of all discovered organs to date.

  1. Adrenal glands
  2. Anus
  3. Appendix
  4. Bladder (urinary)
  5. Bones
  6. Bone marrow (spongy part of the bone)
  7. Brain
  8. Bronchi (tubes in the lungs)
  9. Diaphragm (muscle of breathing)
  10. Ears
  11. Esophagus (food pipe)
  12. Eyes
  13. Fallopian tubes
  14. Gallbladder
  15. Genitals
  16. Heart
  17. Hypothalamus (in the brain)
  18. Joints
  19. Kidneys
  20. Large intestine
  21. Larynx (voice box)
  22. Liver
  23. Lungs
  24. Lymph nodes
  25. Mammary glands
  26. Mesentery (covering of the intestines)
  27. Mouth
  28. Nasal cavity
  29. Nose
  30. Ovaries
  31. Pancreas
  32. Pineal gland
  33. Parathyroid glands
  34. Pharynx
  35. Pituitary gland
  36. Prostate
  37. Rectum
  38. Salivary glands
  39. Skeletal muscles
  40. Skin
  41. Small intestine
  42. Spinal cord
  43. Spleen
  44. Stomach
  45. Teeth
  46. Thymus gland
  47. Thyroid
  48. Trachea
  49. Tongue
  50. Ureters
  51. Urethra
  52. Uterus
  53. Human skeleton
  54. Ligaments (connect muscles to bones)
  55. Tendons (connect bones to bones)
  56. Blood cells
  57. Vagina
  58. Hair
  59. The vestibular system of the ear
  60. Placenta
  61. Testes
  62. Nails
  63. Vas deferens
  64. Seminal vesicles
  65. Bulbourethral glands
  66. Penis
  67. Scrotum
  68. Parathyroid glands
  69. Thoracic ducts
  70. Arteries
  71. Veins
  72. Capillaries
  73. Lymphatic vessels
  74. Tonsils (Waldeyer’s ring of tissues)
  75. Nerves
  76. Subcutaneous tissue
  77. Olfactory epithelium (nose)
  78. Cerebellum

The ten most vital organs are as follows.

Skin

  • The skin is the largest organ in the human body.
  • Its main job is to maintain the body's temperature.
  • The skin contains sweat glands and oil glands. Oil released by the skin releases helps keep the skin from drying out and the hair from becoming brittle.
  • The skin also regularly sheds cells to maintain its effectiveness.

Brain

  • The brain stores information, allows you to think and learn and controls vital daily functions (such as digestion, heart rate and breathing).
  • The brain receives impulses from nerves, which are located throughout the body, and responds to pain and other stimulation.
  • Even though the brain is so important, it is also very delicate. The brain is made of soft tissue and is protected only by the skull, therefore head injuries can be serious.

Heart

  • The heart is another vital organ. In an average lifetime, the heart beats more than 2.5 million times.
  • The heart's job is to pump oxygenated blood throughout the body and receive deoxygenated blood in return.

Kidneys

  • The kidneys are located under the rib cage in the lower back.
  • The kidneys filter things, such as water and salts, out of the blood and produce urine.
  • The kidneys also produce an enzyme called rennin. This enzyme plays a big role in regulating blood pressure.

Liver

  • The liver is in the upper abdomen, slightly to the left.
  • The main job of the liver is to produce bile, which it sends to the stomach for digestion.
  • The liver also filters out toxins and regulates blood sugar.
  • Blood sugar is regulated by the liver, which converts and stores sugar and releases it as needed into the bloodstream. 
  • The liver is also in charge of releasing cholesterol, breaking down fats and producing blood proteins. It is the largest internal organ.

Pancreas

  • The pancreas is located behind the stomach.
  • The job of the pancreas is to produce enzymes necessary for digestion and send them to the stomach.
  • The pancreas also regulates blood sugar by producing insulin.
  • The pancreas also creates glucagon that has the opposite effect of insulin and helps to maintain blood sugar levels.

Stomach

  • The stomach receives food from the esophagus and sends it into the small intestine.
  • The stomach's role in digestion is to break down food and mix it with digestive enzymes.

Small intestine

  • The job of the small intestine is to digest food.
  • It does this by using chemicals, such as enzymes.
  • The small intestine also absorbs nutrients and transfers them to the blood.
  • The small intestine is five meters long. The food moves from the small intestine to the large intestine with a series of muscle contractions.

Large intestine

  • The large intestine is located in the abdomen and is 1.5 meters in length.
  • The large intestine is involved in digestion. It receives undigested food from the small intestine.
  • The large intestine absorbs as much water as possible from the food and then expels the waste and any excess fiber.

Lungs

  • The lungs are located in the chest and are protected by the rib cage.
  • The lungs take in oxygen and they expel carbon dioxide. The lungs deliver oxygenated blood to the heart where it is pumped throughout the body and they receive deoxygenated blood from the heart after blood travels throughout the body.  

Health Solutions From Our Sponsors

Medically Reviewed on 3/12/2021
References
Medscape Medical Reference

FlexBooks®