Human Body Systems Worksheet (Grade 5)
Instructions: Choose the correct answer for each question. Circle the letter of your choice.
Circulatory System
1. What does the circulatory system mainly do?
A) Helps us breathe
B) Moves blood around the body
C) Breaks down food
D) Protects the brain
2. What carries oxygen-rich blood away from the heart?
A) Veins
B) Arteries
C) Nerves
D) Muscles
3. What helps blood to clot and stop bleeding?
A) Red blood cells
B) White blood cells
C) Platelets
D) Plasma
Digestive System
4. Which part of the body absorbs most nutrients from food? A) Stomach
B) Small intestine
C) Large intestine
D) Mouth
5. What breaks down starch in your mouth? A) Pepsin
B) Amylase
C) Lipase
D) Bile
6. Which organ makes bile to help digest fats? A) Liver
B) Stomach
C) Pancreas
D) Gallbladder
Nervous System
7. What is the main job of the brain? A) Pump blood
B) Control the body
C) Store food
D) Breathe air
8. Which part of the brain helps you keep your balance? A) Cerebrum
B) Cerebellum
C) Brainstem
D) Spinal cord
9. What carries messages from the brain to the muscles? A) Motor neurons
B) Sensory neurons
C) Blood cells
D) Bone cells
Skeletal System
10. What are bones mostly made of? A) Iron
B) Calcium
C) Protein
D) Fat
11. Which joint allows the shoulder to move in a circle? A) Hinge joint
B) Ball-and-socket joint
C) Fixed joint
D) Gliding joint
12. What is the longest bone in the human body? A) Femur
B) Humerus
C) Tibia
D) Fibula
Muscular System
13. What type of muscle is found only in the heart? A) Smooth muscle
B) Skeletal muscle
C) Cardiac muscle
D) Voluntary muscle
14. Which muscle helps lift your arm? A) Biceps
B) Triceps
C) Deltoid
D) Quadriceps
15. What connects muscles to bones? A) Ligaments
B) Tendons
C) Cartilage
D) Joints
Respiratory System
16. What muscle helps you breathe in and out? A) Diaphragm
B) Heart
C) Lung
D) Stomach
17. What is the part of the throat that makes sound? A) Pharynx
B) Larynx
C) Trachea
D) Esophagus
18. Which gas do we breathe in to stay alive? A) Oxygen
B) Carbon dioxide
C) Nitrogen
D) Methane
Answer Key:
1. B 2. B 3. C 4. B 5. B 6. A 7. B 8. B 9. A 10. B 11. B 12. A 13. C 14. C 15. B 16. A 17. B
18. A
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