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CodeVID-M5-WS
The Human Body: Working Systems — Practice Worksheet
Chapter: The Human Body: Working Systems
Topic: The Human Body: Working Systems
Maximum Marks: 25
Time: 30 minutes
Name: ____________________ Roll No.: __________ Date: ____________

General Instructions

  • All questions are compulsory.
  • Choose the correct option (A, B, C or D) for each question.
  • The answer key is at the end — try the paper first!
Section A — Multiple Choice (1 mark each) 15 × 1 = 15 marks
1.
The correct order from smallest to largest is…
  • A.Cell, tissue, organ, system
  • B.System, organ, cell, tissue
  • C.Organ, cell, system, tissue
  • D.Tissue, cell, system, organ
2.
The heart is mostly made of strong…
  • A.Muscle
  • B.Bone
  • C.Skin
  • D.Hair
3.
Bones and muscles work together: muscles pull and bones…
  • A.Move at the joints
  • B.Make blood
  • C.Digest food
  • D.Breathe
4.
Most digested food is absorbed into the blood in the…
  • A.Mouth
  • B.Small intestine
  • C.Lungs
  • D.Heart
5.
Blood carries ___ and food to every part of the body.
  • A.Sand
  • B.Oxygen
  • C.Plastic
  • D.Glass
6.
The watery liquid in the mouth that helps soften food is…
  • A.Tears
  • B.Blood
  • C.Sweat
  • D.Saliva
7.
We breathe in mainly to take in the gas…
  • A.Smoke
  • B.Oxygen
  • C.Steam
  • D.Dust
8.
The hard skull protects the soft…
  • A.Heart
  • B.Stomach
  • C.Brain
  • D.Liver
9.
The beating you feel at your wrist is your…
  • A.Yawn
  • B.Sneeze
  • C.Cough
  • D.Pulse
10.
Many cells of the same kind together form a…
  • A.Star
  • B.Stone
  • C.Tissue
  • D.River
11.
A body part that does a special job, like the heart or lungs, is an…
  • A.Island
  • B.Atom
  • C.Orbit
  • D.Organ
12.
The framework of bones that gives the body its shape is the…
  • A.Blood
  • B.Skin
  • C.Muscle
  • D.Skeleton
13.
We breathe faster after running because the body needs more…
  • A.Water only
  • B.Sleep
  • C.Oxygen for energy
  • D.Salt
14.
Digestion of food begins in the…
  • A.Stomach
  • B.Mouth
  • C.Heart
  • D.Lungs
15.
Why is it better to breathe through the nose than the mouth?
  • A.It looks better
  • B.The nose filters and warms the air
  • C.It is faster
  • D.It tastes air
Section B — Challenge / Olympiad (2 marks each) 5 × 2 = 10 marks
16.
Several organs working together for digestion form the digestive…
  • A.Bone
  • B.Cell
  • C.Tissue
  • D.System
17.
A sheet of muscle below the lungs that helps us breathe in and out is the…
  • A.Rib only
  • B.Skull
  • C.Diaphragm
  • D.Heart
18.
Muscles often work in pairs: as one pulls (contracts), the other…
  • A.Relaxes
  • B.Disappears
  • C.Breaks
  • D.Grows hair
19.
Blood also carries waste like carbon dioxide to the lungs to be…
  • A.Stored forever
  • B.Eaten
  • C.Breathed out
  • D.Frozen
20.
Digestion is important because it changes food into a form the body can…
  • A.Absorb and use for energy
  • B.Throw away at once
  • C.See
  • D.Hear

Answer Key

Section A — Multiple Choice (1 mark each)
  1. (A) Cell, tissue, organ, system
  2. (A) Muscle
  3. (A) Move at the joints
  4. (B) Small intestine
  5. (B) Oxygen
  6. (D) Saliva
  7. (B) Oxygen
  8. (C) Brain
  9. (D) Pulse
  10. (C) Tissue
  11. (D) Organ
  12. (D) Skeleton
  13. (C) Oxygen for energy
  14. (B) Mouth
  15. (B) The nose filters and warms the air
Section B — Challenge / Olympiad (2 marks each)
  1. (D) System
  2. (C) Diaphragm
  3. (A) Relaxes
  4. (C) Breathed out
  5. (A) Absorb and use for energy
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