Animal and Vegetable Physiology Considered with Reference to Natural Theology: The mechanical functions

action animal animalcules Annelida appear arrangement articulated attached axis belonging bivalve body bones calcareous cartilage cavity cells cellular centre Cetacea cilia composed consists construction Crustacea Cuvier deposited developement direction effect elastic employed exhibit existence expanded extended external extremities feet fins fishes fluid Flustra foot force functions gemmules growth insects integuments internal joints kind larvæ layer legs length ligament limbs longitudinal magnified mantle materials matter mechanical membrane ment mesothorax microscope mode Mollusca movements moving muscles muscular fibres nature objects oblique observed organs original osseous ossification plants plates polypes porcellaneous portion progressive motion purpose quadrupeds ribs scales seen segments shape shell side situation skeleton solid species spinal spine spinous spinous processes sternum stomata structure substance suckers surface tail tentacula termed texture tion transverse transverse processes tribes trunk tube valves vegetable vertebræ vessels Vorticella whole wings Zoophytes