Introductory anatomy facts
Human Body Organs And Functions
Match major organs with their primary functions, then connect them into systems for circulation, breathing, digestion, filtration, immunity, sensation, and reproduction.
A Study List, Not A Complete Anatomy Course
Organs rarely work alone or perform only one task. These cards use concise primary functions as memory anchors. They do not cover every structure, function, variation, or medical condition and are not medical advice.
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Save every section and Learnalist will introduce them gradually.
Brain, heart, and blood
Control And Circulation
Review organs that coordinate the body and move blood.
Prompt
Which organ processes sensory information and coordinates thought, memory, and movement?
Answer
The brain
Prompt
Which structure carries signals between the brain and much of the body?
Answer
The spinal cord
Prompt
Which organ pumps blood through the circulatory system?
Answer
The heart
Prompt
What vessels carry blood away from the heart?
Answer
Arteries
Prompt
What vessels carry blood toward the heart?
Answer
Veins
Prompt
Where does exchange of gases, nutrients, and wastes occur between blood and tissues?
Answer
Capillaries
Lungs, kidneys, and bladder
Breathing And Filtration
Review gas exchange and the urinary system.
Prompt
Which organs exchange oxygen and carbon dioxide with the blood?
Answer
The lungs
Prompt
What muscle beneath the lungs is central to breathing?
Answer
The diaphragm
Prompt
Which tube carries air from the throat toward the lungs?
Answer
The trachea
Prompt
Which organs filter blood and produce urine?
Answer
The kidneys
Prompt
Which tubes carry urine from the kidneys to the bladder?
Answer
The ureters
Prompt
Which organ stores urine?
Answer
The urinary bladder
Prompt
Which tube carries urine out of the body?
Answer
The urethra
From food to nutrients
Digestive Organs
Follow digestion through its major organs.
Prompt
Where does digestion begin?
Answer
The mouth
Prompt
Which tube moves swallowed food to the stomach?
Answer
The esophagus
Prompt
Which organ mixes food with acid and enzymes?
Answer
The stomach
Prompt
Where are most nutrients absorbed?
Answer
The small intestine
Prompt
Which organ absorbs additional water and forms stool?
Answer
The large intestine
Prompt
Which organ makes bile and processes absorbed nutrients?
Answer
The liver
Prompt
Which organ stores and releases bile?
Answer
The gallbladder
Prompt
Which organ makes digestive enzymes and the hormone insulin?
Answer
The pancreas
Prompt
Which final section of the large intestine stores stool before elimination?
Answer
The rectum
Defense and chemical signals
Immune And Endocrine Organs
Review organs involved in immunity and hormone production.
Prompt
Which gland in the neck makes hormones that regulate metabolism?
Answer
The thyroid gland
Prompt
Which small gland at the base of the brain helps regulate other endocrine glands?
Answer
The pituitary gland
Prompt
Which glands sit above the kidneys and make hormones including cortisol and adrenaline?
Answer
The adrenal glands
Prompt
Which organ filters blood, supports immune responses, and recycles old red blood cells?
Answer
The spleen
Prompt
Which organ helps T cells mature, especially during childhood?
Answer
The thymus
Prompt
Which tissue inside many bones produces blood cells?
Answer
Bone marrow
Prompt
Which structures filter lymph and help immune cells encounter pathogens?
Answer
Lymph nodes
Sensing and reproduction
Sensory And Reproductive Organs
Review major sensory and reproductive organs.
Prompt
Which organs detect light and enable vision?
Answer
The eyes
Prompt
Which organs support hearing and balance?
Answer
The ears
Prompt
Which organ provides a protective barrier and contains touch receptors?
Answer
The skin
Prompt
Which organs produce eggs and hormones including estrogen and progesterone?
Answer
The ovaries
Prompt
Which organ supports pregnancy and fetal development?
Answer
The uterus
Prompt
Which organs produce sperm and testosterone?
Answer
The testes
Prompt
Which gland contributes fluid to semen and surrounds part of the urethra?
Answer
The prostate
How To Practise
Learn one body system at a time. Recall the organ from its function, then reverse the question and explain the function when given the organ name.
Source Note
Core functions were checked against educational material from the US National Institutes of Health, including NIDDK's digestive-system overview and NINDS brain basics.
FAQ
What are the major organs in the human body?
Major organs include the brain, heart, lungs, liver, kidneys, stomach, intestines, pancreas, spleen, skin, and reproductive organs.
What is the largest organ?
The skin is the body's largest organ.
Does each organ have only one function?
No. Most organs perform several related functions and work as parts of overlapping body systems.