1. Chain reaction to stop bleeding
The platelet story T

2. One day in the capillary….
Solid blood parts
RBCs
WBCs
Platelets
Containing
thromboplastin T T

3. You need calcium in your blood to stop bleeding.
Dissolved in the plasma….
Calcium
Prothrombin
Fibrinogen
Not dissolved
thromboplastin T T

4. When you cut yourself
When you cut yourself the platelet breaks open and starts a chain reaction.
Thromboplastin is released and acts as a glue
And makes fibrin threads
They are
sticky threads
like a spider’s web
This makes a mesh over
the cut T T T T

5. Clot formation.. Healing begins
The mesh over the cut
traps RBCs and WBCs
and makes a sticky mass
called a clot.
When it dries
It is a scab. T

6. Ta Dah! You heal Your capillary cells divide and heal the wound.
Your blood flows freely
again T