1. What system is it? Read the definition and fill in the blanks.
1. It expels waste products from the body through the urethra: ___________________________________
2. It delivers oxygen and expels carbon dioxide: ___________________________________
3. It receives inputs from the environment and regulates the body’s feedback: ___________________________________
4. It moves the body: ___________________________________
5. It protects internal organs: ___________________________________
6. It helps prevent diseases: ___________________________________
7. It controls the whole body: ___________________________________
8. It supplies energy to the body: ___________________________________
9. It regulates body functions: ___________________________________
10. It allows reproduction: ___________________________________
2. Fill in the blanks in the following passage with words from the box.
antibody • B cells • blood • B lymphocytes • cell • infection • pathogens • response • T cells • T lymphocytes • toxins • viruses
Lymphocytes are a type of white (1) ____________________________ cells. They play a critical role in keeping us healthy. Without them, we couldn’t survive.
T cells protect us from (2) ____________________________. In our daily lives, we are constantly exposed to (3) ____________________________, such as bacteria, (4) ____________________________, and fungi. Without (5) ____________________________, also called (6) ____________________________, every exposure could be life-threatening. T cells can wipe out infected or cancerous cells. They also direct the immune (7) ____________________________ by helping (8) ____________________________ to eliminate invading pathogens.
B lymphocytes, also called B cells, create a type of protein called an (9) ____________________________. This attaches to antigens (foreign substances), such as viruses or (10) ____________________________, to neutralize them, preventing, for example, a virus from entering a normal (11) ____________________________ and causing infection. (12) ____________________________ can also recruit other cells to help destroy an infected cell.
3. Answer the following questions.
1. How do vaccines work?
2. What are the different types of vaccines?
3. What is an autoimmune disease?
4. What are allergens?
5. What are the most common symptoms of dementia?
6. How many types of diabetes are there?
7. What are the most common health diseases caused by smoking?
8. What are the symptoms of alcohol poisoning?
9. What are the most common drugs among teenagers?
10. What are the symptoms of a behavioural disorder related to smartphone abuse?