Bichat was the creator of descriptive anatomy. He introduced the terms “animal” and “vegetative” system. This was his last work, unfinished at his death. Vol. 4 was prepared by Bichat's student and cousin, Mathieu-François Buisson, and vol. 5 by Philibert-Joseph Roux. Vol. 3, pp. 319-68 includes Bichat's Nerfs de la vie organique. Digital facsimiles of all 5 vols are available from the Hathi Trust at this link.