List of Major Organs in the Human Body

🧍 List of Major Organs in the Human Body

(Grouped by body system)
🧠 Nervous System

Controls thoughts, movement, senses, and communication inside the body.

•     Brain – The command center; controls everything from breathing to thinking.
•     Spinal cord – Sends messages between the brain and body.
•     Nerves – Carry signals throughout the body.

❤️ Circulatory System

Delivers oxygen and nutrients; removes waste.

•     Heart – Pumps blood throughout the body.
•     Blood vessels – Tubes that carry blood (arteries, veins, capillaries).
•     Blood – The fluid that transports oxygen, nutrients, and waste.

💨 Respiratory System

Brings oxygen into the body and removes carbon dioxide.

•     Lungs – Take in oxygen and release carbon dioxide.
•     Trachea (windpipe) – Airway to the lungs.
•     Bronchi – Main branches into the lungs.
•     Diaphragm – Muscle that helps you breathe.

🍽️ Digestive System

Breaks down food for energy and removes solid waste.

•     Mouth – Starts digestion by chewing and producing saliva.
•     Esophagus – Moves food to the stomach.
•     Stomach – Breaks down food with acids and enzymes.
•     Small intestine – Absorbs nutrients from food.
•     Large intestine (colon) – Absorbs water and forms stool.
•     Liver – Processes nutrients and removes toxins.
•     Pancreas – Produces enzymes and insulin.
•     Gallbladder – Stores bile to help digest fats.

🚽 Urinary System (Excretory System)

Removes liquid waste and maintains fluid balance.

•     Kidneys – Filter blood to make urine.
•     Ureters – Carry urine from kidneys to bladder.
•     Bladder – Stores urine.
•     Urethra – Releases urine from the body.

🧬 Endocrine System

Controls hormones and body functions like growth, mood, and metabolism.

•     Pituitary gland – The "master" gland; controls other glands.
•     Thyroid gland – Controls metabolism and energy use.
•     Adrenal glands – Help with stress response and energy.
•     Pancreas – Produces insulin to control blood sugar.
•     Ovaries (females) – Make estrogen and release eggs.
•     Testes (males) – Make testosterone and sperm.

🦠 Immune & Lymphatic System

Defends the body against germs and infections.

•     Lymph nodes – Filter harmful substances from lymph fluid.
•     Spleen – Filters blood and helps fight infection.
•     Thymus – Helps develop white blood cells (T-cells).
•     Tonsils – Trap germs from food and air.
•     Bone marrow – Produces blood cells (including white blood cells).

🧍 Integumentary System

Protects the body and regulates temperature.

•     Skin – Shields the body, keeps moisture in, and helps cool the body.
•     Hair – Protects the head and filters dust.
•     Nails – Protect fingertips and aid in gripping.

🦴 Skeletal System

Gives the body structure and protects organs.

•     Bones – Support and protect organs; help the body move.
•     Joints – Connect bones and allow movement.
•     Cartilage – Cushions bones and supports flexible areas.

💪 Muscular System

Allows movement and supports body functions.

•     Muscles – Move bones, pump the heart, and support breathing.
•     Tendons – Connect muscles to bones.

🧫 Reproductive System

Allows humans to create offspring.

Female Organs:

•     Ovaries – Produce eggs and hormones.
•     Uterus – Where a baby develops.
•     Vagina – The birth canal.

Male Organs:

•     Testes – Produce sperm and hormones.
•     Penis – Delivers sperm.
•     Prostate gland – Helps produce semen.