1) What is the main function of the circulatory system? a) To break down food b) To support the body’s shape c) To deliver oxygen, nutrients, and remove waste like carbon dioxide d) To control breathing 2) Which organ pumps blood throughout the body? a) Lungs b) Brain c) Heart d) Stomach 3) What do blood vessels do in the circulatory system? a) Produce blood cells b) Carry blood to different parts of the body c) Break down food d) Protect the heart 4) Which waste product is removed by the circulatory system? a) Oxygen b) Carbon dioxide c) Water d) Food 5) Which organ in the digestive system starts breaking down food? a) Mouth b) Gullet c) Small intestine d) Anus 6) What is the role of the small intestine in the digestive system? a) Pumps blood b) Absorbs nutrients from food c) Removes carbon dioxide d) Supports the body 7) Through which organ does undigested food leave the body? a) Stomach b) Large intestine c) Gullet d) Anus 8) What does the stomach do in the digestive system? a) Converts food into energy by breaking it down b) Pumps blood c) Takes in oxygen d) Protects the brain 9) What is the main function of the respiratory system? a) To take in oxygen and remove carbon dioxide b) To move the body c) To break down food d) To support the body’s structure 10) Which organ in the respiratory system is primarily responsible for taking in oxygen? a) Heart b) Diaphragm c) Lungs d) Windpipe 11) What is the role of the windpipe in the respiratory system? a) It supports the body b) It carries air to the lungs c) It breaks down food d) It pumps blood 12) Which part of the respiratory system helps control breathing by moving up and down? a) Nose
 b) Mouth c) Diaphragm d) Lungs 13) How many bones are in the human body? a) 206 b) 106 c) 306 d) 406 14) What does the skeletal system do? a) Breaks down food b) Pumps blood c) Supports the body and gives it shape d) Controls breathing 15) Which part of the skeletal system protects the brain? a) Ribcage b) Skull c) Spine d) Leg bones 16) What is produced inside the bones? a) Oxygen b) Food c) Blood cells d) Muscles 17) What is the main function of the muscular system? a) To enable body movement b) To break down food c) To take in oxygen d) To protect the heart 18) What system do muscles work with to allow movement? a) Circulatory system b) Digestive system c) Skeletal system d) Respiratory system 19) Which organ acts as the body’s control centre? a) Heart b) Brain c) Lungs d) Stomach 20) Which of the following is one of the five sense organs? a) Heart b) Tongue c) Brain d) Diaphragm

P.4 Science - Systems

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