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SSC CHSL 2027 Human Body Facts: Important General Science Questions
4/11/2026
SSC CHSL 2027 Human Body Facts: Important General Science Questions
The human body is an important topic in General Science and Basic Biology for competitive examinations. Questions may cover body organs, bones, blood, digestion, respiration and the functions of different systems.
For SSC CHSL 2027 preparation, learning basic human body facts through short notes and practice questions can make revision easier. This guide covers important facts, organ functions and useful MCQs.
1. Important Facts About the Human Body
| Body Part / Organ | Important Fact |
|---|---|
| Skeleton | An average adult has 206 bones. |
| Heart | Has four chambers: two atria and two ventricles. |
| Brain | Controls and coordinates body activities. |
| Skin | The largest organ of the human body. |
| Liver | The largest internal organ and an important digestive organ. |
| Femur | The longest bone in the human body. |
| Stapes | The smallest bone in the human body, found in the middle ear. |
| Kidneys | Filter blood and help remove waste through urine. |
| Lungs | Main organs responsible for gas exchange. |
| Small Intestine | The main site of nutrient absorption. |
2. Important Human Body Systems and Their Functions
| Body System | Main Function |
|---|---|
| Digestive System | Breaks down food and absorbs nutrients. |
| Respiratory System | Takes in oxygen and removes carbon dioxide. |
| Circulatory System | Transports blood, oxygen and nutrients. |
| Nervous System | Controls and coordinates body activities. |
| Excretory System | Removes metabolic waste from the body. |
| Skeletal System | Provides support, protection and helps movement. |
| Muscular System | Helps in movement and maintaining posture. |
| Endocrine System | Produces hormones that regulate body functions. |
3. Blood and Its Components
Blood is a fluid connective tissue that transports oxygen, nutrients, hormones and waste materials throughout the body.
- Red Blood Cells (RBCs): Contain haemoglobin and transport oxygen.
- White Blood Cells (WBCs): Help protect the body against infections.
- Platelets: Help in blood clotting.
- Plasma: The liquid component of blood that carries cells and dissolved substances.
- Haemoglobin: An iron-containing protein responsible for carrying oxygen in RBCs.
Important Fact: The average lifespan of a red blood cell is approximately 120 days.
4. Important Organs and Their Functions
- Heart: Pumps blood throughout the body.
- Brain: Controls thinking, memory, movement and other body functions.
- Liver: Produces bile, processes nutrients and performs detoxification functions.
- Pancreas: Produces digestive enzymes and hormones such as insulin.
- Stomach: Mixes food with digestive juices and begins protein digestion.
- Kidneys: Filter blood and regulate water and electrolyte balance.
- Lungs: Exchange oxygen and carbon dioxide through tiny air sacs called alveoli.
- Small Intestine: Completes much of digestion and absorbs most nutrients.
5. Easy Method to Remember Human Body Facts
- Learn organ-function pairs: Heart – pumping blood, kidneys – filtration, lungs – gas exchange.
- Remember important bones: Femur – longest, Stapes – smallest.
- Group blood components: RBCs – oxygen, WBCs – defence, Platelets – clotting.
- Revise body systems separately: Study one system at a time instead of memorising all facts together.
- Practise quick quizzes: Test yourself with short questions every day.
6. SSC CHSL 2027 Human Body Practice Questions
Choose the correct option for each question.
Q1. How many bones are generally present in an adult human body?
A. 201
B. 206
C. 212
D. 218
Q2. Which is the largest organ of the human body?
A. Liver
B. Brain
C. Skin
D. Lungs
Q3. Which is the longest bone in the human body?
A. Femur
B. Tibia
C. Humerus
D. Radius
Q4. Which blood component helps in clotting?
A. RBCs
B. WBCs
C. Platelets
D. Plasma
Q5. How many chambers are present in the human heart?
A. Two
B. Three
C. Four
D. Five
Q6. Which organ produces insulin?
A. Liver
B. Pancreas
C. Kidney
D. Stomach
Q7. What is the functional unit of the kidney?
A. Neuron
B. Nephron
C. Alveolus
D. Villus
Q8. Which organ is mainly responsible for gas exchange?
A. Heart
B. Liver
C. Lungs
D. Stomach
Q9. What is the approximate lifespan of a red blood cell?
A. 30 days
B. 60 days
C. 90 days
D. 120 days
Q10. Which is the smallest bone in the human body?
A. Femur
B. Stapes
C. Tibia
D. Ulna
Answer Key with Explanations
| Q. | Answer | Explanation |
|---|---|---|
| 1 | B. 206 | An average adult human skeleton contains 206 bones. |
| 2 | C. Skin | Skin is the largest organ of the human body. |
| 3 | A. Femur | The femur, or thigh bone, is the longest bone. |
| 4 | C. Platelets | Platelets play an important role in blood clotting. |
| 5 | C. Four | The heart has two atria and two ventricles. |
| 6 | B. Pancreas | The pancreas produces insulin, which helps regulate blood glucose. |
| 7 | B. Nephron | The nephron is the structural and functional unit of the kidney. |
| 8 | C. Lungs | Gas exchange takes place in the alveoli of the lungs. |
| 9 | D. 120 days | The average lifespan of an RBC is approximately 120 days. |
| 10 | B. Stapes | Stapes is the smallest bone, located in the middle ear. |
7. Preparation Tips for SSC CHSL 2027
- Revise important organs and their functions daily.
- Learn the basic facts about bones, blood and body systems.
- Prepare short notes for important biological terms.
- Practise organ-function matching questions.
- Attempt basic General Science quizzes regularly.
- Revise incorrect answers to improve accuracy.
Prepare for SSC CHSL 2027 with Katara Academy
Understanding basic human body facts becomes easier with organised notes, quick revision and regular practice. Strengthen your General Science preparation with consistent learning.
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Frequently Asked Questions (FAQs)
1. How many bones are there in an adult human body?
An average adult human skeleton has 206 bones.
2. Which is the largest organ of the human body?
Skin is the largest organ of the human body.
3. What is the functional unit of the kidney?
The nephron is the structural and functional unit of the kidney.
4. Which blood cells help fight infections?
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