The exchange of fluid in the sac may well have a respiratory significance, in addition to its object of facilitating the movements of the tentacles.
The waterways of Cochin-China communicate by means of natural or artificial channels (arroyos), facilitating transport and aiding in the uniform distribution of the inundation to which the country owes its fertility.
Much labour was bestowed by him upon facilitating the computation of the movements of the asteroids.
William the Conqueror revived it immediately of ter his accession, as a convenient method of national taxation, and it was with the object of facilitating its collection that he ordered the compilation of Domesday Book.
This characteristic is of great economic importance, the natural twist facilitating the operation of spinning the fibres into thread or yarn.