Lesson Worksheet: The Reproductive, Excretory, and Immune Systems Science • 4th Grade
In this worksheet, we will practice identifying the parts and describing the functions of the reproductive, excretory, and immune systems.
Q1:
What is the purpose of the immune system?
- ATo help bacteria reproduce (grow)
- BTo help regulate body temperature
- CTo help the body fight infection and disease
- DTo help the body digest food
Q2:
Which of these organs helps to prevent germs from entering our body?
- AThe kidneys
- BThe lungs
- CThe stomach
- DThe skin
Q3:
Which cells help fight and kill germs in our bodies?
- AWhite blood cells
- BRed blood cells
- CSkin cells
- DNerve cells
Q4:
Which organ holds urine until it is excreted from the body through the urethra?
- AThe kidneys
- BThe ureters
- CThe bladder
Q5:
Complete the following sentence: Waste from the blood is filtered in the kidneys and mixed with water to form .
- Aurine
- Bbile
- Csaliva
- Dpancreatic juice
Q6:
The immune system is located all over the body. Which of the following is not a part of the immune system?
- ASkin
- BWhite blood cells
- CMucus in the nose
- DMuscle tissue
Q7:
Where are female egg cells produced?
- AThe kidneys
- BThe stomach
- CThe ovaries
- DThe bladder
Q8:
Which body system is responsible for producing offspring?
- AThe digestive system
- BThe reproductive system
- CThe skeletal system
- DThe respiratory system
Q9:
Which organ in our bodies stores urine?
- AThe liver
- BThe bowels
- CThe kidneys
- DThe bladder
Q10:
What is the main function of the excretory system?
- ATo help the body fight disease
- BTo remove waste from our body
- CTo take in oxygen and give off carbon dioxide
- DTo help produce growth hormones
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