What is a scab?

The video explains what a scab is and how it forms. It begins with an introduction to scabs, followed by a detailed look at blood under a microscope, highlighting the roles of red blood cells, white blood cells, and platelets. The video then describes how platelets help form a scab to stop bleeding and protect the wound, allowing new skin cells to grow and heal the cut. Once healed, the scab falls off, completing the healing process.

What is a common place where you might find a scab?

• On a knee

• On a tree

• On a book

• On a car

What is the primary function of red blood cells?

• To fight infections

• To carry oxygen

• To form scabs

• To produce energy

Which type of blood cell is responsible for fighting diseases?

• Platelets

• Skin cells

• White blood cells

• Red blood cells

What do platelets do when you cut yourself?

• They stop the bleeding

• They produce energy

• They carry oxygen

• They fight infections

What happens to the scab once the skin underneath has healed?

• It stays permanently

• It turns into a scar

• It falls off

• It changes color