VHS+Science+Lesson+24+CAPA+Level+5+Science+Focus+Skill+11+12


 * **Science Focus Skill 11: Know that the skin protects the body from infections** ||

(Fill rubber glove with water, pass around to students?)

http://www.learn360.com/ShowVideo.aspx?ID=229036

(let students know that there is going to be a test at the end and they need to pay attention.)

What is skin?



The skin on our bodies performs many different roles.

Sensation: Your skin has many receptors  (sensors) that perceive sensations such as touch, temperature changes, pressure and pain.



Protection: Skin is an elastic covering. It protects you against exposure to dangerous things in the environment such as bacteria.

  It also repels water, minimises water loss from the body, and protects underlying structures such as blood vessels, nerves and organs.



Temperature regulation
Your skin helps you maintain a healthy body temperature in two ways: a. by changing the diameter of your blood vessels in your dermis b. by perspiration (sweat glands cause water to be evaporated from the surface of your skin, cooling your body).

and "goose bumps"  This is the body's way of preserving its own heat by causing the hairs on the skin to stand up, which reduces heat loss.



Vitamin D:

Vitamin D is formed inside your body but first it has to be activated by your skin, which needs to be exposed to ultraviolet light from the sun.

media type="youtube" key="fUiELiIXbgk" width="420" height="315" (play till 3:33, let students know that we'll finish the rest of the video at the end of the lesson if there's time).

(for closure, review pictures but ask students to state what skin does for our body based off of the pictures. pass out candy to students who raise hand to answer a question)

Focus Skill 12: Know that vaccination protects an individual from infectious disease. a. Answer yes/no questions about a vaccine b. answer yes/no about the purpose of a vaccine c. indicate who gives vaccines d. student will indicate that parents take their children to get vaccines

Thinking about protecting ourselves from infections, let's switch focus a bit and discussing what a vaccine is.

Raise your hand if you've ever had to go to the doctor? What can you tell us about it? What do doctors do for us?





Sometimes a doctor has to give us medicine or a vaccine.

<span style="background-color: #ffffff; color: #545454; font-family: arial,sans-serif; font-size: small;">A vaccine is a product that produces immunity from a disease and can be administered through needle injections, by mouth, or by aerosol. <span style="background-color: #ffffff; color: #545454; font-family: arial,sans-serif; font-size: small;">It protects us from infectious diseases.



Have you ever had to take medicine or have a vaccine before? Who gave it to you?

http://www.learn360.com/ShowVideo.aspx?ID=925909

(pass out worksheet and complete with students)