Ileo-cæcal valve, [151].

Ileum, [151].

Images,
Diagram illustrating, [372].
Formation of, [371].

Incisors, [143].

Incus, [359].

Infectious diseases, [394].

Infundibula, [80], [84].

Inhibitory impulse, [305].

Insomnia, [329].

Inspiratory force, [70].