The first mineralized hard tissues form at this location.

Biomaterials are classified in two groups, hard and soft tissues.

But the hard tissues, such as the teeth, did not shrink.

He sought out these, and let his fingers dig deep there, wrestling with hard tissue.

And now he has turned his attention to tooth enamel, one of the most active fields in biological research on the body's hard tissues.

This is true not only for hard connective tissues such as bone and tooth.

This tough shell is the hardest tissue in the human body.

Not only couldn't most men survive that, such an injury would have left a thick ridge of hard white tissue.

The process gives a record of soft tissue as well as hard tissues.

It was toothless, and its jaws were covered in hard tissue, like a bird's beak.