Question

please answer this question​

Answer 1

Answer:

Four Main Parts of the Tooth

– Enamel: Enamel is the hard calcified tissue on the surface of your teeth. ...

– Dentin: Dentin is a sensitive layer of living tissue that communicates with the nerves in your teeth. ...

– Cementum: Cementum is a hard connective tissue that covers tooth roots.

Answer 2

Answer:

1)all the events of the past

2)history up to the present day, from some arbitrary point taken to represent the end of the Middle Ages. In some contexts it may be contrasted with ‘ancient’ rather than ‘medieval’ history, and start (for example) from the fall of the Western Roman Empire.