Important Human Body GK Questions with Answers

Human Body GK Questions

🔹 Basic Level

1. What is the largest organ in the human body?
2. Which organ pumps blood throughout the body?
3. How many bones are there in an adult human body?
4. Which part of the body controls all activities?
5. What is the normal body temperature in Celsius?
6. Which gas do humans need to breathe in for survival?
7. Which organ is responsible for filtering blood?
8. What is the main function of the lungs?
9. Which organ helps in digestion of food?
10. How many chambers are there in the human heart?

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🔹 Intermediate Level

11. What is the smallest bone in the human body?
12. Which blood cells help fight infection?
13. What is the liquid part of blood called?
14. Which organ produces insulin?
15. What is the function of red blood cells?
16. Which vitamin is produced in the skin through sunlight?
17. What is the function of the spinal cord?
18. Which part of the brain controls balance?
19. What is the main function of the liver?
20. Which organ stores bile?

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🔹 Advanced Level (Exam-Oriented)

21. What is the basic unit of life in the human body?
22. Which gland is known as the “master gland”?
23. What is the normal pH of human blood?
24. Which organ is affected by hepatitis?
25. What is the function of platelets?
26. Which part of the eye controls the amount of light entering?
27. What is the largest bone in the human body?
28. Which system controls hormones in the body?
29. What is the function of the nephron?
30. Which part of the brain is responsible for thinking and reasoning?

Human Body – Answers with Explanations

🔹 Basic Level

1. Skin
   👉 It is the largest organ and protects the body from external damage.
2. Heart
   👉 Pumps blood to supply oxygen and nutrients throughout the body.
3. 206 bones
   👉 An adult human skeleton has 206 bones.
4. Brain
   👉 Controls all body functions and activities.
5. 37°C
   👉 Normal human body temperature is around 37 degrees Celsius.
6. Oxygen (O₂)
   👉 Essential for respiration and energy production.
7. Kidneys
   👉 Filter waste products from the blood and form urine.
8. Gas exchange
   👉 Lungs take in oxygen and remove carbon dioxide.
9. Stomach
   👉 Breaks down food using acids and enzymes.
10. Four chambers
    👉 Two atria and two ventricles.

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🔹 Intermediate Level

11. Stapes (ear bone)
    👉 The smallest bone located in the middle ear.
12. White blood cells (WBCs)
    👉 Protect the body by fighting infections.
13. Plasma
    👉 The liquid component that carries nutrients and cells.
14. Pancreas
    👉 Produces insulin to regulate blood sugar levels.
15. Transport oxygen
    👉 Red blood cells carry oxygen using hemoglobin.
16. Vitamin D
    👉 Produced when skin is exposed to sunlight.
17. Transmits nerve signals
    👉 Connects brain with the rest of the body.
18. Cerebellum
    👉 Maintains balance and coordination.
19. Detoxification
    👉 Liver removes toxins and processes nutrients.
20. Gallbladder
    👉 Stores bile produced by the liver.

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🔹 Advanced Level

21. Cell
    👉 The smallest structural and functional unit of life.
22. Pituitary gland
    👉 Controls other endocrine glands, hence called “master gland”.
23. 7.4 (approx.)
    👉 Slightly alkaline for proper body function.
24. Liver
    👉 Hepatitis is inflammation of the liver.
25. Blood clotting
    👉 Platelets help stop bleeding by forming clots.
26. Iris
    👉 Regulates the amount of light entering the eye.
27. Femur (thigh bone)
    👉 The longest and strongest bone.
28. Endocrine system
    👉 Produces and regulates hormones.
29. Filtration of blood
    👉 Nephrons remove waste and form urine.
30. Cerebrum
    👉 Responsible for thinking, memory, and reasoning.