Misc: Despite the hump, a camels spine is?

Questions

The wristwatch invented in 1896, 1898 or 1904?

The _____ Revolution began in 1905 on 'Bloody Sunday' when troops fired at demonstrators?

There are 325 days in a christian year; the rest are called _____?

There are 45 miles of what in the skin of a human being?

There are 625 sweat glands in one square inch of human ______?