Online Test — The Human Body: Working Systems
10 Questions • 12 min • Chapter MCQ
12:00
Question 1 of 10
easy
The smallest living building blocks of the body are…
Bricks
Cells
Boxes
Beads
Explanation: The body is built from tiny cells.
Question 2 of 10
hard
We breathe faster after running because the body needs more…
Water only
Sleep
Oxygen for energy
Salt
Explanation: Hard work needs more oxygen, so we breathe faster.
Question 3 of 10
medium
The hard skull protects the soft…
Heart
Stomach
Brain
Liver
Explanation: The skull guards the brain inside.
Question 4 of 10
easy
A group of body parts that work together to do a job is called a…
System
Toy
Game
Song
Explanation: Body parts working together form a system.
Question 5 of 10
easy
Teeth help in digestion by…
Smelling
Tasting only
Chewing and breaking food
Pumping blood
Explanation: Teeth break food into small pieces.
Question 6 of 10
easy
Muscles help the body to…
Move
See
Smell
Taste
Explanation: Muscles pull on bones to make us move.
Question 7 of 10
easy
Digestion of food begins in the…
Stomach
Mouth
Heart
Lungs
Explanation: Digestion starts in the mouth as we chew.
Question 8 of 10
medium
Air enters the body through the nose and travels down the…
Windpipe
Food pipe
Blood pipe
Bone
Explanation: Air goes down the windpipe to the lungs.
Question 9 of 10
hard
Why does the heart beat faster when we exercise?
To cool down
To pump more blood and oxygen to muscles
To stop digestion
To sleep
Explanation: Working muscles need more blood, so the heart speeds up.
Question 10 of 10
medium
The beating you feel at your wrist is your…
Yawn
Sneeze
Cough
Pulse
Explanation: The pulse shows your heartbeats.