The Human Body: Major Organs
Instructions: Read each question carefully and write your answers in the spaces provided.
1. Fill in the Blank
The \_\_\_\_\_\_\_\_\_\_\_\_\_\_ pumps blood around your body and beats about 100,000 times every day.
2. Fill in the Blank
You have two \_\_\_\_\_\_\_\_\_\_\_\_\_\_ in your chest that fill with air when you breathe in and push air out when you breathe out.
3. Multiple Choice
Which organ breaks down the food you eat and turns it into energy your body can use?
- A) Brain
- B) Kidney
- C) Liver
- D) Stomach
4. Multiple Choice
What is the main job of the kidneys?
- A) To pump blood around the body
- B) To filter waste and extra water out of the blood
- C) To send messages to your muscles
- D) To help you digest food
5. Label the Organs
Match each organ to its job by drawing a line — or write the correct letter next to each description.
| Organ | Description |
|---|---|
| A. Brain | \_\_\_\_ Controls breathing and thinking; your body's control centre |
| B. Heart | \_\_\_\_ Cleans your blood and makes bile to help digest fats |
| C. Liver | \_\_\_\_ Pumps blood to every part of your body |
| D. Lungs | \_\_\_\_ Take in oxygen and release carbon dioxide |
6. Short Answer
Name two things your skin does to protect your body.
7. Word Problem
Your heart beats about 70 times per minute when you are resting.
- How many times does it beat in one hour? \_\_\_\_\_\_\_\_\_\_\_\_\_\_
- How many times does it beat in one day (24 hours)? \_\_\_\_\_\_\_\_\_\_\_\_\_\_
Show your working:
8. ⭐ Challenge Question
The brain is divided into different parts that each have a special job.
Name one part of the brain and explain what it does.
\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_
\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_
Answer Key
1. Heart
2. Lungs
3. D) Stomach
(The stomach uses acid and muscles to break down food.)
4. B) To filter waste and extra water out of the blood
5.
| Organ | Correct Match |
|---|---|
| A. Brain | Controls breathing and thinking; your body's control centre |
| B. Heart | Pumps blood to every part of your body |
| C. Liver | Cleans your blood and makes bile to help digest fats |
| D. Lungs | Take in oxygen and release carbon dioxide |
6. Accept any two reasonable answers, such as:
- Acts as a barrier to keep out germs and bacteria
- Keeps moisture inside the body
- Protects against UV rays from the sun
- Regulates body temperature through sweating
7.
- One hour: 70 × 60 = 4,200 beats
- One day: 4,200 × 24 = 100,800 beats
8. Accept any well-explained answer. Examples include:
| Part | Job |
|---|---|
| Cerebrum | Controls thinking, memory, feelings, and voluntary movement |
| Cerebellum | Controls balance and coordination |
| Brain stem | Controls automatic functions like breathing and heartbeat |