Unit 5: Protection and Control

Viruses can make you feel awful! This article explains how feeling bad might be your immune system’s way of helping you heal.

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.

Get your hands cold for science and explore the topic of sensory adaptation.

What is a reflex? Test your reaction time and find out why reflexes are important in this challenge activity.

Snake venom can be dangerous for your circulatory system, nervous system or muscular system. But it can also be very useful in medicine.

Explore the concept of persistence of vision in this hands on activity.

Everything and everyone ages. But scientists have made discoveries about our cells and circulatory and immune systems that could potentially one day be used to increase human lifespans.

The human eye lets us see the world by sending impulses to our nervous system. In many ways, it is very similar to other optical devices, including cameras.

Researchers have found that consuming foods rich in flavanols is linked to more efficient blood flow, which can improve brain function.

When a person has cancer, CAR-T Therapy uses their own cells to destroy the cancer cells in their body.

Heavy metal is a term for some toxic chemical elements. They can cause problems like bioaccumulation, but are useful in nuclear medicine and medical imaging.