Nuclear bodies in the caecum of the rabbit.

The structure and cytochemistry of nuclear bodies in the caecum of the rabbit are described and a developmental pathway from morphologically simple to complex forms is proposed. Simple nuclear bodies are proteinaceous in nature while complex bodies possess a proteinaceous capsule with some associated ribonucleoprotein. The interna of complex bodies possess various individual components consisting either of deoxyribonucleoprotein, ribonucleoprotein, or unassociated proteins. The significance of these nuclear bodies in caecal biology is discussed.