Quick Answer. According to Science NetLinks, cells convert energy for your body and continually divide to make more cells for growth and repair. The body has about 200 different types of cells, and specific cells have assorted jobs to do. The various shapes of body cells depends on each cell's job.
knock boots. verb - intransitive. to have sexual intercourse. They were knocking boots 'til sunrise. See more words with the same meaning: sex, sexual intercourse.
Thimble-knocking also refers to the practice of Victorian schoolmistresses who would tap on the heads of unruly pupils with dames thimbles. Before the 18th century the small dimples on the outside of a thimble were made by hand punching, but in the middle of that century, a machine was invented to do the job.