Strand B: Tissues, Organs, and Systems of Living Things

Celiac disease is an autoimmune disorder. Gluten triggers an immune system response, seriously affecting nutrition.

We all know someone who has been affected by cancer. What causes cancer? Why is it getting more common?

Make a model of blood and learn about the function of each of the parts that makes up blood.

Many people have had children using assisted reproductive technologies. But some of these medical biotech techniques can raise some ethical issues.

Spending time outside has important physical and psychological benefits. It can even help you learn better!

When you cut your finger, your immune system kicks in to protect you from pathogens.

Using stethoscopes, doctors can use sound waves to detect various health issues. Learn how this device has evolved since it was invented in 1816!

Cloning makes it possible to bring extinct species back to life. But is that a good idea?

Astronauts can experience bone loss in space. To understand why, you need to know a bit about how bones are formed and maintained in your body.

Errors during meiosis can alter the number of chromosomes in cells and lead to genetic disorders.

In April 2016, Let’s Talk Science volunteer Daniel Tarade donated stem cells to help a person who needed a stem cell transplant to survive. Learn what stem cells are, how and why people donate, and what Daniel’s experience was like.

Many people believe that hookah smoking is safer than cigarette smoking. But in fact, hookah smoking can be even more harmful to your health!

Did you know that too much carbon dioxide in the classroom can affect your body, and even your grades?

Learn how e-cigarettes and other vaping products work, and why scientists and health professionals have concerns about their safety.

Make some fake snot and explore the function of mucus in this fun activity.