Update 3 files

- /docs/development/image-3.png
- /docs/development/03biomaterial.md
- /docs/images/biomaterials/gw.jpg

docs/development/03biomaterial.md

@@ -7,6 +7,11 @@
 
 ## **GELATIN BASED**
 
+### **GELATIN WITH WOOL**
+
+
+![flowers](../images/biomaterials/gw.jpg){ width=1000 }
+
 ### **GELATIN WITH POTATO STARCH**
 
 ![flowers](../images/biomaterials/ps.jpg){ width=1000 }