Class 3 GK Worksheet: Human Body Systems
Remember (Which team?): Digestive: food pipe, stomach, intestines, liver. Respiratory: windpipe, lungs. Circulatory: heart, blood vessels, blood. Nervous: brain, spinal cord, nerves. Skeletal: skull, ribs, backbone. Jobs: heart – pumps blood, lungs – take in oxygen, kidneys – clean the blood, skull – protects the brain, ribs – guard heart and lungs. Numbers: 206 bones, 4 chambers in the heart, 2 lungs, 2 kidneys, 32 grown-up teeth.
NameDateTime takenScore ___ / 40
- 1.🔍 Which is the odd one out? (a) thigh bone (b) blood (c) heart (d) blood vessel
- 2.👂 The smallest bone of the body is in the ___. (a) toe (b) finger (c) ear (d) nose
- 3.🫀 The large intestine is part of which body system? (a) digestive system (b) nervous system (c) circulatory system (d) skeletal system
- 4.True or false: thinking and learning is a job of the ribs. (a) False (b) True
- 5.🧍 Which is the largest organ of the human body? (a) heart (b) kidney (c) skin (d) brain
- 6.True or false: the small intestine is part of the respiratory system. (a) True (b) False
- 7.Which of these is part of the skeletal system? (a) skull (b) nerve (c) blood (d) spinal cord
- 8.💨 Which gas does our body need from the air we breathe in? (a) oxygen (b) smoke (c) carbon dioxide (d) steam
- 9.What is a job of the lungs? (a) pumping blood (b) guarding heart and lungs (c) taking in oxygen (d) protecting the brain
- 10.🦴 How many bones are there in a grown-up’s body?
- 11.🫀 The blood vessel is part of which body system? (a) digestive system (b) respiratory system (c) circulatory system (d) skeletal system
- 12.What is a job of the muscles? (a) pulling bones to move (b) covering the body (c) taking in oxygen (d) protecting the brain
- 13.Which of these is part of the digestive system? (a) thigh bone (b) brain (c) backbone (d) liver
- 14.What is a job of the heart? (a) churning food (b) taking in oxygen (c) pumping blood (d) thinking and learning
- 15.🩺 Which body part has this job: protecting the brain? (a) skin (b) lungs (c) skull (d) ribs
- 16.True or false: taking in oxygen is a job of the lungs. (a) False (b) True
- 17.👄 Where does digestion begin? (a) in the stomach (b) in the mouth (c) in the heart (d) in the lungs
- 18.🫀 The food pipe is part of which body system? (a) digestive system (b) skeletal system (c) nervous system (d) circulatory system
- 19.What is a job of the stomach? (a) pumping blood (b) taking in oxygen (c) cleaning the blood (d) churning food
- 20.🦵 The longest bone of the body is in the ___. (a) neck (b) arm (c) thigh (d) finger
- 21.True or false: the thigh bone is part of the skeletal system. (a) False (b) True
- 22.🔍 Which is the odd one out? (a) backbone (b) skull (c) nerve (d) thigh bone
- 23.❤️ How many chambers (rooms) does the human heart have?
- 24.🫀 The small intestine is part of which body system? (a) digestive system (b) circulatory system (c) respiratory system (d) skeletal system
- 25.What is a job of the brain? (a) churning food (b) cleaning the blood (c) thinking and learning (d) taking in oxygen
- 26.What is a job of the kidneys? (a) cleaning the blood (b) protecting the brain (c) taking in oxygen (d) covering the body
- 27.🩺 Which body part has this job: taking in oxygen? (a) ribs (b) lungs (c) skin (d) brain
- 28.🔍 Which is the odd one out? (a) blood (b) spinal cord (c) heart (d) blood vessel
- 29.🫀 The spinal cord is part of which body system? (a) digestive system (b) skeletal system (c) circulatory system (d) nervous system
- 30.🔍 Which is the odd one out? (a) heart (b) skull (c) blood vessel (d) blood
- 31.Which of these is part of the digestive system? (a) lung (b) large intestine (c) blood (d) rib
- 32.True or false: guarding heart and lungs is a job of the brain. (a) False (b) True
- 33.🫀 The rib is part of which body system? (a) digestive system (b) skeletal system (c) circulatory system (d) respiratory system
- 34.🫀 The nerve is part of which body system? (a) nervous system (b) respiratory system (c) circulatory system (d) digestive system
- 35.True or false: the large intestine is part of the digestive system. (a) False (b) True
- 36.True or false: the large intestine is part of the respiratory system. (a) True (b) False
- 37.🩺 Which body part has this job: pulling bones to move? (a) muscles (b) kidneys (c) skin (d) lungs
- 38.🫀 The thigh bone is part of which body system? (a) respiratory system (b) nervous system (c) circulatory system (d) skeletal system
- 39.True or false: the small intestine is part of the circulatory system. (a) False (b) True
- 40.True or false: pulling bones to move is a job of the muscles. (a) False (b) True
Answer key
- thigh bone
- ear
- digestive system
- False
- skin
- False
- skull
- oxygen
- taking in oxygen
- 206
- circulatory system
- pulling bones to move
- liver
- pumping blood
- skull
- True
- in the mouth
- digestive system
- churning food
- thigh
- True
- nerve
- 4
- digestive system
- thinking and learning
- cleaning the blood
- lungs
- spinal cord
- nervous system
- skull
- large intestine
- False
- skeletal system
- nervous system
- True
- False
- muscles
- skeletal system
- False
- True
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