Etude en Microscopie Optique et Electronique a Balayage de l'Evolution Structurale des Parois du Caecum et du Colon, Durant la Periode Perinatale, Chez le Lapin (Oryctolagus cuniculus L.)

The study, through optical and scanning microscopy, of various developmental stages, from the 24th day of gestation to the 13th day after birth, shows a quick development of the structures of the caecal and colic mucosal layers to the adult forms, from the very first week of postnatal life. The distal part of the colon is full-grown before the other parts of the alimentary canal, and is particularly rich in mucous cells. The caecum is the place where an early lymphoid defense is provided, from the 30th day of gestation.