I think its made out skin and fat.....
Or maybe blubber an skin...
Nails are made of iron. If you are as tough as iron then you are really tough.
denim
muscle
Denim
It's made out of polystyrene and tough nylon together, miced together and made as a solidIt's made out of polystyrene and tough nylon together, miced together and made as a solid
ASASASASASSA
By tough machines. lol
It made them look tough.
ASASASASASSA
The outer layer of the eye, known as the sclera, is made of tough tissue that helps to protect and maintain the shape of the eyeball.
The homonym for tough is 'tuff,' which refers to a type of volcanic rock made of compacted volcanic ash.
Yes. Bacteria have tough exterior walls made of peptidoglycan, aweb-like molecule complex made of carbohydrate strands cross-linkedby short peptide bridges.